I know a lot of people like the Dreamcast and what have you, but if we're going by consistency as far as games I like/would like to play, then to me it isn't. I have a wantlist and the Dreamcast happens to be in it, as I would like to own one sometime someday, but game-wise I only have exactly 28 games listed that I'd like to get, and of the 28 some have been ported to other consoles. The same can be said about the Wii U, it's in my wantlist, but the games I'd like to get roughly reach 20.
The PlayStation 2 for me is the most consistent, as I have around 300+ games that I've played some way or another and like, and still have more in my wantlist that I would like to get. Having acquired a TEST PS2 has broaden the horizon even more.