Depends. Durring the pre-Sega & Nintendo era, I loved my TI-99/4A. Yeah, it sucked in compairison to some of the other consoles out there.. but I was just a kid. Plus it had the voice synthesizer, which really blew my socks off. It might have sounded a bit like WOPR, but it TALKED!
When my parents picked up the Sega Mastersystem, I was hooked on Sega games for life. In fact, I used to get made fun of for liking a company "noone had ever heard of". But my SMS blew the NES away in all aspects save for the sheer quantity of games, so I always ended up walking away from those people with a smug grin. I\'ve owned every sega console and add-on since except for the Nomad and Dreamcast.. which I will pick up as soon as my finacial situation settles down again or my tax returns get in. (Well, I didn\'t own the Sega VR system or the Sega computer.. but those were more or less prototypes that didn\'t get around to my area.)
I also love my PC for all the classic games I\'ve played on it over the years. To tell the truth, there\'s quite a few times my Genesis got neglected due to games like Leisure Suit Larry, King\'s Quest, Jill of the Jungle, Commander Keen, CountDown, Doom, Martian Memorandum... and of course.. Quest for Glory. However, computers were very expencive, and being a kid I couldn\'t upgrade for the newer games. (Hell it wasn\'t till 97 that I finally got my 486!)
Sony hooked me with Resident Evil and Destruction Derby 2. I had planned on buying a Saturn after watching the demo video Sega sent me.. but in the end, Bug, Black Fire, and Clockwork Knight just couldn\'t compete with the games on Sony\'s console. Never before had I seen such raw violence and mature oriented games on a console. Comming from Boogerman, Zombies ate my Neighbors, and Sonic.. it was quite a blow to me that Sony would allow such games when everyone else was afraid to after the "NightTrap/Mortal Kombat" fiasco on Capital Hill.
Eventually, I bought the NES, SNES, Saturn, and N64 (actually, it\'s my sisters.. but I put it to the most use). They\'re all great machines, but they don\'t have what it takes to be my favorites.
So even though I voted Sega.. I\'m really kind of an "All of the Above" guy. Sierra (pre-98), Sega, and Sony will always be at the top of my favorite companines list.