I like a couple of deep stacks, and a few small stacks. The biggies can pay you off and the shorties you can push around.

I like to watch what other players are doing who are taking down pots. Do they push into a minraise? Checkraising the turn? Who bets how much when they have a big hand? Who folds to how much? Who smooth calls with the nuts? Who check raises with the nuts? Who will play a 74 to the river just cause the hand is named after him?