If you liked the Rosario to Vampire anime, the Anime-Planet community thinks you'd like:
In a world where magic is a reality, the young Louise is at the bottom of her class. Dubbed "Zero" by her classmates at Tristein Academy (due to her zero success rate for magic), Louise (along with all first year students) was charged with summoning a familiar; and instead of a cute magical creature, the familiar arrived in the form of... Saito Hiraga, a normal Japanese boy who was abruptly teleported from his own world?! Can both Louise and Saito come to terms with their new and complicated "relationship" and (more importantly) help Saito find a way home?
Both Zero no Tsukaima and Rosario to Vampire contain the idea of magic as a major theme (for Rosario it's more mosters, but there is magic too). They also both have a girl of a higher class (a vampire) who likes a boy of a lower class (a human). This is a bigger idea in ZnT. Also, the girl vampire always gets jelous when the human that they like has another girl that likes him.
Both are about the male lead ending up in a 'magical'/supernatural new world/school and meeting a cute girl.
They are both ecchi harem romance action comedies. Both animes include harem, but there is never 'distraction' from the main male/female leads, and rather the 'harem' works at resolving each new plot event.
Themes of both include class division (nobles/commoners monsters/humans), and a consequent breaking of barriers. Action for both are mainly 'fun' action sequences that are mostly absurd than serious.
These anime are similar for several reasons. They are both harem comedies, they both have some fan service (Although RtV has more), the male lead is a human in a world centered around magic, and they are both centered around class division (or species division). I think anyone that liked either of these would be able to enjoy the other.
If you liked Zero no Tsukaima then you would really like Rosario + Vampire or the other way around.Both have very powerful and high class female lead who falls in love with a nonpowerful low class male lead.
Morisato Keiichi has always had bad luck. No matter what he does or how he acts, nothing seems to go his way. His bike frequently breaks down, his classmates take advantage of him, women ignore and scorn him, and on top of all that, he’s only 5'3". In Heaven, when someone’s bad luck and good luck are so heavily out of balance, Belldandy (Goddess First Class, Second Category, Unlimited) of the Goddess Assistance Agency comes to the rescue. Belldandy grants Keiichi one wish to make up for all of his bad luck, but when Keiichi wishes for Belldandy to stay by his side forever... the trouble begins. Can Keiichi keep Belldandy by his side, or will outside elements force her to return to heaven?
Same theme basically. Both animes are harems where the lead main character needs to be constantly protected by his main love interest who have supernatural powers. Difference? Well Rosario is much more ecchi.
Both AMG and RTV have a weak male protagonist that somehow ends up with a strong female "superhuman". Both pokes fun of the absurdity with slight humor and there are other females after the male protagonist. RTV has more of a harem theme and ecchi, whereas AMG has a more developed plot. The female protagonists are different with respect to what they are. In AMG the female protagonist is a goddess, whereas in RTV she is a vampire.
Both revolve around the guys innability to announce his love for the girl of his dreams. Other common elements include powerful(supernatural) female lead character with a normal human male lead character.
Both are fun to watch but Rosario to Vampire includes adult aspects such as sexual humor so be aware.
Kouhei Hasekura has changed schools so many times that he’s convinced he’ll never make friends, but luckily for the boy, he’s just transferred for the last time into Shuchikan Academy, a prestigious high school on Tamatsu Island. After being welcomed warmly by student council vice president Erika Sendou on his first day, Kouhei’s good vibes quickly disintegrate when she screams and runs away as they’re about to shake hands. What’s more, the boy soon discovers that Erika and her brother, the student council president Iori, are anything but typical: they’re vampires! Can Kouhei find his place at Shuchikan Academy and finally make true friends, including the vampire who can’t seem to tolerate standing near him?
After Twilight shining vampires aren't nothing new but there are even cases in anime industry where vampire depictions aren't so grimdark as they usually are. Here we have vampires who don't initially pose a threat to humans but try to co-exist as much as possible and don't have the stereotypical weaknesses which allow them to go to school like all the other kids do.
There is also romance involved, so if you're looking for anime with light romance and a tad bit of comedy involving vampires these shows are the right pick, though again enjoyment may vary from person to person.
Besides both featuring a vampire as one of the main cast both also feature a normal young male lead who comes to learn that the world he has entered is not completely as it seems. As well as the fact that the vampire in both series try to and want to seek a somewhat peaceful coexistence with humans. The biggest differnce between the two is that while in Fortune Arterial it's a world mostly dominated by humans and the vampires are a somewhat minor existence and in Rosario to Vampire it mainly takes place in a place that is mostly dominated by monsters and the sort.
In these anime, a normal boy who has transfered to a new school encounters new people, some of which are supernatural. He learns to live with them, and gains more knowledge of them throughout the series. There is mild romance in both of these anime, along with some humor, and some saddening parts.
Aika Sumeragi is still in high school, but having already earned her C-class salvager's license, she has no need for career counseling. While Eri, the class president, takes a dim view on Aika advertising her services at school, she seems to have no qualms about hiring her herself on behalf of the school's Treasure Hunting Club. A girl named Karen has mysterious tattoo which contains a hidden clue to the whereabouts of something unknown, and after packing their short skirts and panties, the club sets out on a journey to discover the answer; but not everyone on board is who they seem to be. Aika's first job is turning out to be far more serious than she originally thought; and thus, her illustrious career as a panty-flashing secret agent begins!
Both of these shows have large chested women, and plenty of pantyshots! The characters are all noticeably different, and the women are very strong willed. Also both have plenty of action and fiction.
Aika are-16: Virgin Mission and Rosario to vampire both have the same type of action scenes with strong independent characters who are able to fight the ‘bad’ guys around them. And for you guys, panty shots galore!
Nyarko-san and Rosario to Vampire have a lot in common. Firstly, they are both supernatural harem anime were the guy everything focuses on is human. Furthermore, both mix horror elements with comedy to get... well, comedy. To top it of they both have a bit of fanservice. (Though, in Nyarko-san's case it's more to the characters' enjoyment.)
They are not a perfect match, mainly because their sources pf humour are very different, but I think that if you like one of them you should at least try the other.
both are boy dealing with things normal humans are not supposed to see, one is aliens, one is monsters, both have harem and comedy, with the poor boy just trying to survive from day to day