Because PC gaming looks better. And you don't have to pay for Xbox Live.
And a computer is going to last longer than a console (except in the case of a PS2, which lasted like 11 years).
My computer, which I have had for awhile has seen alot of upgrades, but its more because I like to upgrade more than anything.
If I left my computer the way it was 2 years ago, it would still be running the latest games on high settings with no problem.
I spend alot of money on computers because I enjoy building them. I need to start selling them off though. Make some money back lol.
And welcome to the forums!