What's crazy is that the reason why I bought the Dreamcast is because of Sonic Adventure, Jet Set Radio, and Shenmue. I got the bundle that came with Sonic Adventure and bought the others soon after. Inside that bundle came with the demo disc with many games. DOA2 was one of the demo games.
At the time, Sonic going 3D got me hooked awhile back. It was shocking to me back then when I saw on TV to see Sonic going from sidescrolling to what SA was and I was like "Woa woa, this looks pretty epic, I gotta get this".