I spent time with Castlevania: Curse of Darkness, Sly 3: Honor Among Thieves, Soul Calibur III, and Pac-Man World 3. Not a single one of those games makes me want to part with my money before they're under $15. The closest was Sly 3 which had a neat (but not compelling) biplane dogfight sequence that I enjoyed. Wasn't that in the first game though? I sure feel like I've played it before.
I should mention that Shadow of the Colossus is on this demo disc and is worth my money. I'd already played that demo a couple of weeks ago and the game is on my Xmas 2005 list.
What about the other five games? None were interesting looking enough for me to even wait through the 20 seconds to boot them up. Another Mortal Kombat? And Jak racing? And Ratchet? Something about Global Terror? And EyeToy?
Let me try to say something positive: At least this year the demo disc won't eat my memory card.
I don't buy many games, but being a fan of Ico, I bought Shadow of the Colossus. It was worth every penny.