I've been using openSUSE for about six years now. I've tried other distros but haven't found any others I like as well. Plus most of my Linux knowledge is based on openSUSE.
I built my first computer about 8 years ago and installed Linux on it because I didn't want to use Windows. I've been having fun ever since. Right now I'm looking at my Apple 20" Cinema display and typing on my Apple aluminum keyboard, powered by my home-built openSUSE box. As I type this, I happen to be using the partition that has the 64 bit version installed. Everything works great.