I honestly don't think I could name one game on either the 360 or PS3 that I haven't felt underwelmed in some way, whether it be lack of AA, content, sound, or playability etc.. yet looking back to previous generations there were plenty of games where I felt more satisfied that the game was complete and worthy of it's price tag.
Take for instance GOW2 for the PS2, IMO it's a more complete game than any of the PS3/360 titles with maybe the exception of Oblivion and yet that's last-gen...
Maybe with age I have greater demands from games or perhaps developers are happy to cut corners and expect medals for what they can acheive?
I thought with this generation we were going to be treated to Next-Gen gaming, but as yet I don't feel it has arrived on either platform