I'm going with 9-ball, too.
Straight pool's too frustrating. When I was a kid, I could run 50-60 balls like rolling off a log. Now, I have trouble running a rack. And, the ideal break shot is a shot I have trouble with now. Forgetaboutit!
I'm not in love with 8-ball, but I don't mind playing by Texas Express rules.
One-hole? Maybe when I grow up. Right now I have enough trouble making the balls in 6 holes.
I would enjoy some 50 cent Chicago or Pill Pool if I could find players willing to partake.