I loved Tech Romancer back in the day.. the game just hasn't really aged well. I didn't believe it at first, until I put some time into it, but yea, hasn't aged well at all. However, I'd like to see it ported to maybe something like the PSP with cleaned up graphics.
I think I can narrow down the DC's worthy games into maybe 20 - 25 awesome games if you don't count stuff that got ported to other systems... it's even less if you don't like shmups or fighters. Record of Lodoss War is still nifty, though, and Samba will always be cool (since I have the maracas), so I'll always at least keep the system and a few games.
I played almost every game before I sold them, and some of this stuff is just horrible. For the record, Power Stone 1 >>>> Power Stone 2
2 is just a mess with too many games and items, it loses the urgency and the "oh no he's got all the gems I'm screwed" factor that 1 had, and the levels are all too gimmicky for my tastes.