If you'd asked me twenty years ago, straight pool would b my number one, but not anymore. In order, my top six today are:
1. 9-ball or 10-ball played Texas Express
2. Straight Pool
3. One Pocket
4. Eight Ball
5. 10-ball with call shot and 10-ball last
Nine ball is the most interesting game for me. My favorite parts of nine ball are defense, kicking and two way shots. Two way shots are, to me, the most majestic shots in all of pool, bringing shot conceptualization to a much higher level.
Straight pool is nice because of its variety. Every rack is a new type of challenge and the problem solving can challenge even the finest players.
One pocket has been growing on me. It requires at least as much creativity as any game played on a pool table and the shot design can be so complicated that it baffles even the very best in the discipline. I really enjoy the racks that come down to the last two balls.
I don't have banks on my list because it's not a game I play.