Teekyuu gets me all the time.
Detroit Metal City and Great Teacher Onizuka. Though I think Food Wars' random exploding clothes and some of the scenes from JoJo makes me do "wtf squints" the most often.
The One Punch Man manga has had me loling
Wait if you really want to laught watching an anime you gotta watch GTO great teacher onizuka probably the best recommendation beside gintama of course.
Ooooh yeah I forgot about Great Teacher Onizuka, yes I loved that one.
Plus you have to watch the live action drama of it too, it's just as good.
Gintama for sure!!
Gotta be one punch innit
Teekyuu, I really recommend it! Especially in a group of people/friends.