I've played all but Trash Panic. Of the ones I've played the only decent one is Ragdoll Kung Fu. I absolutely hated PAIN, can't figure out why some people enjoy it. Different tastes and whatnot, but still....
I think all of them are interesting concepts with fairly lacking executions. I haven't played too much of PAIN but it struck me as a small game trying to be a big game and not quite managing it. Rag Doll Kung Fu seemed compromised over the original vision. Super Rub a Dub was a victim of the twin problems of Sony's early efforts to shoehorn motion control into everything, and of the general issue of developers turning a tech demo into a game. Trash Panic was something I was very much looking forward to based on the pre-release trailers, but managed to bury an interesting idea (a non-gridded Tetris game) under too many boring rules.
Trash Panic is really fun, but they made it obnoxiously difficult, to the point where you need a guide and a lot of luck just to beat the game on normal. Super Rub a Dub is good, and I don't know why it attracts so much hate. :p
The other two games are utter garbage though. [Edit: actually, RDKF was fun, but had really awkward controls and got tiresome very quickly.]