I prefer Intel for many many reasons. They offer a lot more processors within a rather large price range, such as a dual core for roughly $100, and then an Extreme for well over a $1000. They consistenly bring out new technologies, which is always good. They also have a lot of CPUs in stock at retailers and e-tailers. So supply is virtually never out.
Second, the company makes roughly 10 times more then AMD does. So in terms of money, Intel hands down. Not only that though, but Intel offers a very good price-to-performance ratio. Peopel to often say, "yeah well an FX-60 is better!" Really? Is somethign $1000 that good if it can be beaten by a $100 dollar CPu then a $100 water cooling kit to overclcok then outright beat it? I think Intel offers a better price-to-performance ratio simply because of their capability.
I may come across as a fan boy, but I kid you not when I'm totally open to either company's products. Seeing as how either CPu still processes the same data, it's all I/O so it doesn't matter to me, but whe it comes to which is better in MY opinion, then I think with these very reasons I choose Intel.