Kinda similar here. I dislike "me too" responses, and tend to be the devil's advocate because that's the point of debating vs "commenting". The funniest is when my comments get downvoted, yet acquire tons of responses [1] [2]. It's kind of interesting to see how the votes fluctuate until they reach their final (usually low) score.
I wouldn't say I'm a devil's advocate sort. I just don't seem to fit anyone's ready-made assumptions/categories/whatever. I say something like "I lost a lot of weight and it's nice to feel better but I'm not entirely comfortable with all the invasive attention from total strangers". Someone gives me advice on how to avoid male attention. It hadn't occur to me initially to clearly state that the majority of the discomfiting attention is from women who want to be like me, not men who want to get with me.
I have a serious medical condition that is supposed to be killing me, and I do still have bad days at times, but I'm getting well when doctor's (and everyone else) says that can't be done (getting well is why I have slimmed down so much). To me, that is an ordinary fact and I talk about it casually at times online, the way I would to the two sons who live with me and know all the details. For other people, that's a headfuck and most folks divide up between being highly impressed or spitting in my face and accusing me of both making up crap and being a danger to others to talk about it (which makes me want to go "Okay, which is it? You can't have it both ways.").
In short, I guess I'm the anti-group-think wherever I go. AKA lightening rod for controversy.
[1] http://news.ycombinator.com/item?id=3116043 [2] http://news.ycombinator.com/item?id=3125017