Retro Gaming Suggestions?

In the last few weeks, I've had to line up single player games while we move the 360 downstairs to our "good TV" so that me and the wife have stuff to watch together while we hang out with our little ones... and my oldest son loves Blues Clues and Thomas... anyway it's meant that I don't use my 360 for gaming very much these days, and it's forced me to dust off my older consoles. Besides, we're being prudent with our budget while the missus is out of work, so I have to finally use those other entertainment options that I keep saying I'll use... but don't for one reason or another.

I have 4 others - an Xbox (running XBMC), a chip modded PS1, a PS2 slim, and a Dreamcast. Throw in the usual sites for finding games and I've had a revival of sorts on my older systems.

In particular I've spent a lot of time on the Xbox, since I'm experimenting with XBMC, but I've managed to start those games that I never got to play... and I'm surprised at how well the gameplay holds up, even today. Goes to show you that a good game is a good game no matter WHAT console era you're in.

Does anyone else still keep their old systems around? Have any suggestions on must play games? I am playing Fable (Good side), Manhunt, and GTA: San Andreas. I am particularly impressed with GTA - the soundtrack alone makes it worth full price if you ask me.

Also on my to-do list are:

Ico

Jade Empire

KOTOR II

Grandia II

Skies of Arcadia

Shenmue

Chrono Cross