32red is a Prima site - so it's got a good selection of Holdem tables, plus a few PLO8 ones, and not much else, some good freerolls, and that's about it - nothing special - reasonable, but without much reason to become a favourite.
Dream Poker I think is also a Prima site, so the exact same comments would therefore apply.
No particular negative experiences, and if you fancy trying No Limit Omaha High/Low, then the $2 Sit-n-Gos on Prima have some very bad players.
If you have only played at UB, then I'd recommend investigating PokerStars
. Alternatively, if soft competition is your main criteria, then Party or Pacific are probably worth looking at.