I spent more tries on CMR (close to 10000) than any other level, although many were resets after the first couple of seconds when I didn't get the start that I wanted.
I'd say that any level that you really spend a lot of time becomes your favorite level even it wasn't before.
Ya, just not playing so much. I haven't spent the time with my iPhone yet to transition. The Palm 650 is still around, but the battery won't last a full run. Someday, I'll give it a go.