Two pairs are dangerous, as most players over-play them. I dont think its two pairs in general, but its what we have at all times, versus just two pair.
I dont like to separate values of hands (two pair, sets, etc) versus just combining the information and figuring out a range. If you have two pair and think your opponent is bluffing
, trap. If you think they have a draw, pressure and bet/raise. If they have you beat, well guess what, fold. Its not so much how we play this individual values of hands versus what our ranges of opponents are. On certain boards, two pairs are as good as bluffs, and on others they're as good as the nuts. But its hard to ask how to play an X hand, because we need a ton more info. Deduce ranges, not your two cards.