Forgot AMVs, the opening and ending sequences of anime are an artform in and of themselves, many times more entertaining than the actual show itself. It is on my dreams to create an archive of every anime opening and ending sequence ever made, but until that day comes (which will probably never happen), I'll settle for this, a thread discussion to share and discuss anime op/eds you've found and feel should be noticed.
Okay I'll start off:
Not much going on in there but it's one of my favorites because even if you're not familiar with the show you can tell from the whatever the hell it is the characters are doing there how silly it is. I like how they're able to convey just how weird the show is without a lot of dynamic action.