NOTE: I am basing this review on both the first and seond seasons. Also, NEVER EVER IN YOUR LIFE, watch the anime... it killed the story and the manga.
Story: At first, the story of Rosario to Vampire seems simple and very comedic and entertaining. Poor Tsukune, who is just a normal human teenager, gets the biggest misfortune of his life when he accidentally gets enrolled into a school of monsters. The first person he meets, however, is a gentle, cute, and loving girl, Moka, but later does he find out she is in fact a vampire, which is hard to believe based on how she acts like an angel and looks beautiful. Moka herself also later finds out that he is a human, but she does not care, for Tsukune was the first friend she has ever had and does not want to lose him when he decides to bail out and head home back to the human world. For the rest of the story in most of the first season, it is about how Tsukune must survive, make a social life within this school of monsters, and struggle with his emotions for Moka. As you can see, the story, like I said, seems quite simple and very funny, but later on into season one, and now really getting interesting into this season two, you will realize there is more to the story than meets the eye. The adventure of Tsukune starts to get more complex as the story progresses, leading to new enemies, new friends, new mysteries, bigger battles, and more bloodshed. You will see powerful and deadly enemies arise, mysteries that sometimes make steam come out of your head come to life, and the romance of an unusual and unwanted couple become stronger.
Characters: The characters in this story are all entertaining and fun in their own way. All the characters have a proper backstory, except for maybe... *SPOILER* Kurumu *SPOILER*... who didn't get a really well explained and intimate one like most of the others. In my opinion, Tsukune is the most entertaining character who eventually becomes one of your favorite badasses of all time, while Moka is the character with the biggest and most mysterious background. Moka's backstory is constantly stressed throughout the entire manga, and you don't really get a good picture until later in Season 2. Even then, Moka's background still feels a little mysterious and you fell like there might be a LITTLE BIT more to it. Either way, all the characters have had their hardships and bright times in their lives. They all constantly question themselves and their feelings for their friends and try the best they can to protect eachother in hard times.
Art: The art in Rosario to Vampire starts out kind of a little weird looking for some reason, in my opinion, in the first season, but it isn't bad at all. As the manga pregresses the art becomes better and better over time, and really starts kicking in Season 2. All in all, the art is nothing special, but it isn't bad either. In my honest opinion, the art seems just right for my taste and I see nothing wrong with it. The characters are easily recognizable and you can't mix them up. Throughout the manga, I only have ONE little problem with the art, and that is *SPOILER* the god/fox spirit dude or whatever, when he transforms into his god/fox state, he looks like the 9-tailed fox from Naruto, especially in season two when he increases his power, giving himself like 6-10 tails *SPOILER*. One of my faborite things in the art is *SPOILER* Tsukune's goul/vampire mode which just looks really badass and pumps you up like you want him to rip a bad guy to shreds!
Overall: All together, I really like and enjoy Rosario to Vampire, especially Season two where the story REALLY starts kicking. If you like a manga with action, a shit ton of comedy, and a nice romance between two unlikely... people... then Rosario to Vampire will definitly satisfy your tastes, and still leave you itching for more.