you know, im in the minority amongst my gaming 'friends', but i really dig the dreamcast. breaks my heart sega got out of the hardware business.
i have had nothing but fun on that console. if you havent tried sega bass fishing (the first one, i dont like the second as much), you really need to give that a shot. especially if you can get your hands on a fishing controller. and some beer.
the console im playing the most right now would be the gba tho. i picked up golden sun so i could survive one of my wifes 'drag-james-along-shopping' trips, and that game has been a heck of a lot of fun. i also picked up zelda oracle of ages and oracle of seasons. almost as much fun as the snes zelda.
i have a gamecube, and its a little light on 'must-own' titles right now, but super smash bros melee is a fantastic, rogue squadron rules, and its easily the cutest box on my entertainment center.
~james