People that are nice ALL. THE. TIME. get to me. Even (especially?) when they are genuine. Because I'm not. I have strong opinions about things -- negative opinions sometimes -- and I don't want to pop people's bubbles or pee in their koolaide, but I can't stand pretending like the emperor is wearing an Italian suit.
So, yes, give me a little bitchy so I don't have to feel like I need to have a lobotomy or gouge my eyes out in order to have a conversation with someone. I'm too old for that crap.