Post a series AND list a running gag in it

There are lots of running gags in Gintama and I can only express them in phrases (I know this seems more of an inside joke, but someone who has watched Gintama would understand most of this!) XD

~Zura Janai, Katsura da! (It's not zura, It's Katsura!)
~95% glasses, 3% water, 2% trash
~IT'S THE FRIGGIN SHOGUN!!!!
~GORILLA! GORILLA! SATISFACTION!
~Why are they always aiming for my balls!?
~**CHOMP**
~wowowowowowowowo BAD COMMUNICATION!
~What the hell are you doing ZURA!?
~She can turn anything into dark matter!
~Mayooonnaaaaiise.....
~I'll give you till the count of three... one! *BANG*
~This show is always at the verge of falling apart. We might as well start airing the same episode 8 times, next week

There's a bunch more I'm thinking but this is all I can remember XD

There are a lot in Baka to Test, but I guess I'll go with Akihisa getting beat up by Minami when he says she's not girly enough/her chest is too flat, since it happens in nearly every episode.

A running gag in Ouran High School Host Club is banana peels randomly appearing and tripping the characters

I just started watching FMA: Brotherhood and I'm at ep 25 now (such an awesome series....why am I only just watching it now xD)

But I've found a whole running gag about Ed being short, it never gets old xD