I don't like playing ring games in a short timeframe, I feel pressure to make money and it just dosent work like that. Even aggressive play requries time to build reads, establish a table image and patients to strike that killer blow. Often I'll be at a table for 3+ hours and only make serious money in the last 1/2 hour when eveything comes together.

If you only have an hour to spare then SNG's are ideal, there you have to get everyones chips within that hour to win the most money.