For the PS3 the only games I regret buying are Mirrors Edge (bought it because it looked different but just didn't enjoy it at all) and Fat Princess.
I would say I'm dissapointed in the PSP, although I don't quite regret buying it as I would have got one just for FF:Crisis Core and FF:Agito but I regret many of the games I bought. The only games I seem to enjoy on the system are RPG's (FF:War of the Lions, Disgaea 1 and Tales of Eternia are all fantastic) but everything else I have been very dissapointed with (Resistance, Dissidia, Monster Hunter) so think I will just buy the former from now on (and maybe LBP).
I also regret not buying almost all the great games on PS1 and PS2 as I didn't know they existed until I found this forum, luckily I won't be making that mistake this time round!
