I recently went switched from Party to Poker Stars after taking half a dozen bad beats in the span of a few days. I had heard that Stars is much tighter than Party, and its true. In the few weeks I played at Stars, every table I played at (.25/.5 and .5/1), the tables were extremely tight, 2-3 players to the flop on unraised pots, and usually 1-2 in on raised pots. The pots were much smaller on Stars. Sure, you'll win more pots on Stars than on Party, but from what I found you're lucky if you win more than just the blinds. Party is extremely loose from what I've seen, and overall it seems like it is more profitable in the long run. I know my bankroll took a lot of swings on Party, but ultimately you'll be better off playing on there than Stars.