You're a fanboy of "something" (IP/dev/etc) but you don't like..

[Mr_No]

I'm a Sony fanboy but I really dislike when PSN goes down without warning.

I'm a Metal Gear Solid fanboy and I hate that they've reduced the quantity of guys in skintight suits throughout the years.

I'm a Ratchet & Clank fanboy and I really hated how Insomniac dropped the game for a while and let others develop sub-par entries.