I switched to intel when the Core 2 architecture came out, having been an AMD user since the K6-II days. It felt dirty at the time, but I have to admit, I haven't regretted it.
I'm just waiting for the inevitable, where AMD overtakes intel again. It's like a 2 man relay race.
Same here. I had the 400mhz K6-III. Wow. that was the first system I had that could play back a DVD full frame-rate. Then I got the 800 Athlon. Then a 2700+. Now I really don't use regular desktop computers anymore.