I feel like I've had this conversation about a million times before.
Different people like different things.
Personally I like both console and PC. Consoles are better for racing and sports games almost definitely, while PCs are typically the best for FPSes and strategy games. RPGs are a toss-up to me, as both have their fair share of great ones.
Its all a matter of PREFERENCE, there is no "best" system for gaming (except for individual people, which means, the Xbox might suit one person's tastes the best, while PC another person's, you get the picture).
Sorry to rant, but far too many times this has come up in various places and it always sickens me because people get all defensive over it for some reason. Just be thankful there's so many choices to choose from for your gaming, and live in peace console and PC gamers.