I own a Dreamcast, and still consider it to be among the best gaming consoles ever. Sega, BTW, has done a lot of "firsts" in their history, including having the first system to play CD-ROMs (Sega CD), having the first one to have a modem (Genesis), cable system interactivity (Sega Channel), broadband suport (Dreamcast).. unfortunately they didn't market their stuf too well. I have basically any good game for the system, and some that aren't that great as well! There were/are a lot of unique games for that system, some really obscure ones (such as Bomber Hehe, a Japanese game dealing with placing explosives in buildings to see how the building would fall...or Seaman the one with the talking human-faced fish guy, and it had an interactive microphone which somehow attached to the controller!) But I mainly got the system for EMULATION! Here's a site devoted solely to emulation on the system:
http://www.dcemulation.com. They have some tutorials, active message boards, and lots of burning tips on how to properly burn the emus to disc.