Snooker and one pocket are my favorite games to watch, in snooker you get the best of both worlds with run outs and every safety battle is unique unlike 9 or 10 ball. With one pocket you get to see defense and strategy at it's best as well as cue ball control when it's played at it's highest levels!
To me the best game would be one pocket on a 10 foot snooker table. Have always felt this way and I'm surprised it hasn't been attempted more since Diamond started building 10 foot pool tables and their popularity. I would also be interested in watching some pay ball or even liability and golf which I've never seen any of those played before.