Same here.. I pretty much upvote everybody with whom I interact on Steemit. It's my way of saying 'Hey, thanks for giving me your attention!' I guess? :)
And yes, stuff that you disagree with.. just walk the other way? it's what I do.. no sense in picking a fight
I almost wrote an entire post entitled "the value of upvoting opposition viewpoints during debate". I never got around to it before I gave up the battle around here.