I'd LOVE to be able to play Daytona USA on my computer, somehow; that arcade game is fantastic fun, from memory, but I haven't been able to try it for ages since I haven't been to an arcade for ages.
Or hell, I hear Rayman 2 is brilliant, but I've never gotten around to playing it, as I've never owned an N64, Dreamcast, or PS1, and whilst I had a PS2 as a kid I never heard of Rayman. Apparently it was released for Windows, but...1999/2000 is ancient. Would it even work on modern OSes?