If I'm a fanboy of anything, it's Sega. Funnily enough, I never owned a Sega Genesis, and was never a Sonic fan back in the 16-bit heyday. I was all Nintendo and all Mario, even though I only owned a PC. But, from a content standpoint, Nintendo had my heart (in that console realm).
Fast forward a number of years, and I waited in line on 9.9.99 for a Dreamcast. In college I had dabbled in consoles, and bought a Nintendo64 while I worked at Babbage's (bonus point to anyone who shopped at one of those), but I was overall a PC guy. For some reason I saw that the Dreamcast had soul, and I loved it. In fact, I still own one (VGA adapter and all). Some of my favorite gaming experiences are on the Dreamcast. NFL2K was a monster of a game, and Jet Set Radio will be a forever favorite. I even found all the soundtracks to JSR from a local "anime" shop, back when such things were hard to find.
Recent Sega re-releases and updates have had my heart all a-twtitter. The announcement of Jet Set Radio was like welcoming home and old friend (and here's to hoping for Eyefinity/Surround support), and the recent Sonic Episodes are like a time warp back to my childhood.