As succinctly as I possibly can, when it comes to general purpose "computing" (word processing, photo editing, e-mail, database storage, internet), I want the system, hardware and OS to get the f@ck out of my way. I just want it to work and work well. Like my automobiles. You should just turn them on and go. This is why I prefer Mac's.
If I wanted to constantly be messing around with hardware and software configs all day long, worried if my latest purchase is going to be compatible or not, it'll be in the form of a hobby that is much more fun and gratifying to me. Enter the Amiga.