I already posted this on my profile, but I’d like to put it on my blog as well for those of you who glossed over it/didn’t read it.
For the most part, I leave supportive one- or two-sentence reviews. Sometimes I’ll ask a question or two, but usually I’ll just praise your effort. For my friends, though, I’ll leave extended reviews, detailing everything I like about the story, and maybe a few critiques here and there. I used to be kind of rude, correcting grammar left and right and pointing out all the flaws, rather than appreciating the effort put into each publication, but I’ve mellowed out with time, and I try to be nothing but supportive (unless I’ve been explicitly asked to critique the story, in which case all bets are off).