I have a few quests I don't want to complete because they're evil. Don't want to play evil character so I'm wondering if I've done something wrong, there seems to be no options, once you recieve a quest, to abandon or to complete the quest with a 'good' outcome. I don't want to beat a priest to death or be a summoned assassin for a little kid. Is it just me or what?
As said before, if you complete the "kid's one", you'll be able to favor the humanity by
Spoiler destroying de Dark Brotherhood
In addition, if the other quest you mention is the one I think (the cannibalism one), again, you are able to choose the "right" way; the game often offers an alternative by using violent methods, wich in this cases and with your character would be more than welcome. Both quests, again if I don't misunderstand the "priest" one, allow you to do "good things" if you go through them.