Is that a copy of DDR Club Mix I spy at the bottom of that Dreamcast pile? I played a ton of DDR on my Dreamcast back in 2000, like 4 hours a day. Mostly 2nd Mix, but with some Club Mix layered in.
There were a lot of great games I remember on the Dreamcast. Bangai-o, Record of Lodoss War, Skies of Arcadia, Crazy Taxi, Space Channel 5, Samba De Amigo 2000, Gunbird 2, Ikaruga. I think the Dreamcast had the best balance of quality games across genres.