God, I hate when people comment shit like "nice pic but I prefer Hinata1!!" or "awhhhhsa but Narutooo you belong to Sakuraaa!1!" or shit like that in commissioned OCxCanon pictures. Like, seriously... is it necessary to say that kind of thing? It's so damn annoying.
I agree - even if you really do prefer another pairing with that character or whatever, it's about being polite and just staying quiet and going to find something you do like instead of wasting time commenting negative crap.