That would be Shounen, Yaoi, and Sports.
Shounen anime. They are boring, has too many episodes,drags on too long, pacing is slow as hell, and a large amount of filler episodes.
Example: Bleach, Naruto
Any anime that has Yaoi vibe will be blacklisted immediately.
Example: Shinsekai Yori, Sakamichi no Apollon
Most sports anime is stupid and pointless. Storyline is usually typical and very cliche. Doesn't provide intertainment and enjoyment for me.
Example: Prince of Tennis, Kuroko no Basket
Slam Dunk is one of my favorite anime though.