Looking at someone else's tase, say, in clothing or art, you judge it according to your own personal taste. If it doesn't comply with it, it's bad taste. If it does, it's good taste. That's how I define the difference anyhow. Sorry if what I just said doesn't make any sense, I am awful at expressing myself.
I see "good taste" and "bad taste" as more societally influenced. "Good taste" being more generally socially acceptable and "bad taste" not being socially acceptable (e.g. child porn).
I'd like to think I'm primarily influenced by Fi regarding beauty but in truth, Fe does play an influence. If I like a painting and almost everyone thinks its ugly or vice versa, I start doubting my own feelings about it and try to seek an underlying reason why my perspective is so different from the "norm." I'll also try to understand where the others are coming from. Of course there's never 100% agreement, so just because someone disagrees with me on whether or not they like a painting isn't going to change my point of view about it, but if it seems like *everyone* disagrees, then I start to doubt my feelings. Yeah, I know I'm weird that way.
5w6 or 9w1 sp/so/sx, I think