Great Teacher Onizuka. I cry of laughter every episode. I'm actually rewatching it right now, for the 6th time.
Daily Lives of High School Boys had some jokes that where just too funny.
Gag Manga Biyori!
Danshi Kokosei no Nichijo! ^^
might have to give it a try @Doppleman
KonoSuba and KonoSuba 2 never fail to make me laugh.