If you liked the School Rumble OVA anime, the Anime-Planet community thinks you'd like:
Ten-year-old genius Chiyo, animal-loving Sakaki, loudmouth Tomo, athletic Kagura, weight-conscious Yomi and dim-witted Osaka are six friends who share laughs, good times, and a high school homeroom. With scary (and sometimes perverted) teachers, school festivals, penguin suits and general hilarity abounding, you can be sure that there's never a dull day in the life of one of these students!
If you liked the wacky comedy in School Rumble OVA then you should check out Azumanga Daioh. Both have the same sort of random, school based humour, so if you like that in your anime, then both of these will satisfy you.
Sousuke Sagara is far from the average high school student - not only is he highly trained in military tactics, he puts his knowledge to use in every single applicable situation (and even those nonapplicable ones.) So, when confronted with high school, he tends to turn average high school experiences into off-the-wall adventures. Love letters become terrorist threats and field trips become commando operations; his survival depends on the watchful eye of his best friend and classmate, Kaname. Together, they may just make it out of high school alive...
FMP Fumoffu is another anime in which a male character is put into strange and hilarious situations due to his ignorance of romance. Just like School Rumble it is quite random as well. This is a must watch if you liked the School Rumble OVA.
In Gintoki's Japan, the arrival of the various space races known collectively as the Amanto ended the era of the samurai. The Amanto's highly advanced technology resulted in total conquest and a severe economic shift. Now, former samurai such as Gintoki scrape together whatever livelihood they can. Gintoki's profession of choice is that of a yorozuya: he'll complete any job for money. However, he’s unmotivated; and spending most of the day on the couch with the latest issue of Jump and a carton of Strawberry Milk is his preferred pastime. It turns out that his new unpaid employees, Shinpachi and Kagura, are going to interfere with his pastime even more than with his "work"! Of course, none of this means he has really given up on his samurai ideologies!
Have a problem? Talk to Otogi Bank, a student aid group that helps people get what they need – for a hefty price. Led by Liszt Kiriki and staffed by tsundere Ryouko, inventor Majolica, jealous Otohime, flirtatious Tarou, serious Alice, nervous Ryoushi and maid Otsuu, Otogi Bank assists with everything from helping break into a rival school to convincing an upperclassman to not quit a sports team. Can Otogi Bank manage to make all their clients happy, and most importantly, will Ryoushi ever manage to win Ryouko’s heart?
Ouran High is a school for the extremely wealthy or, in Haruhi's case, the extremely talented. But no amount of talent will help when Haruhi accidentally drops an eight million yen vase in a music room. The vase was the property of Ouran High School Host Club, a group of attractive young men who, for a fee, provide their time and affections for their lovesick clientele: the female students. Fascinated by this strange new specimen, a poor and clumsy commoner, they force Haruhi to work for them until the debt is repaid; but they get a lot more than they bargained for...