My current main game is 20 max buy-in, dealer's choice. All games are played no-limit with an ante of 1, and flop games are dealt bomb-pot style (action starts on the flop). We play a lot of double-board Hold'em and Omaha variants, and several versions of Scarney, Dramaha, Dramahold'em, and SOHE. We also play a fair amount of stud and non-poker games (1–3 spread limit, 3 bet cap).
Obviously the buy-in cap and antes mean this game plays very shallow, at least at the start. But the structure also spurs a lot of action because with only 20 hands worth of antes in your stack, you can't sit around waiting for the nuts all night. Get the money in the middle or get whittled away. As the night progresses, stacks will build up and allow for more robust late-round play. I'd say we have a good balance of skilled players and donators.
On the average night, total purse is around 400–600. We might crack 1,000 in the bank if we have a big night with two tables or multiple big fish in the game driving the action up.