Hmm... I never really liked SEGA that much but this seems like it was an alright console. I remember when it first came out I had only an N64 (my first console), and I saw an ad for some Dreamcast games and they looked kind of dumb to me at the time... of course there were only like ten games out for it at that point though.
It really depends what you grow up with. I only had an N64 until Gamecube came out, and then I branched out and got a PS2 and an XBox as well. I had like 50+ games for my N64 but now I've lost/sold all but a handful... it really sucks because my console still works, but I don't have any of the cool games like Goldeneye anymore (they need to put that and some others on VC with online play).
Anyways, IMO the N64 was the best console ever, even if only because I never played the Dreamcast, but for me, games like Star Fox 64, LoZ: OoT, Banjo Kazooie, Glover (who remembers that one?), and Diddy Kong Racing are timeless. There were so many more... can't remember nearly all of them...