I tire of negativity, my brothers in arms! Let us list the beautiful positives of PC gaming!
I'll go first:
Ultimately, PC Gaming is cheaper than consoles. Let us assume that a reasonable system (including monitor, keyboard etc) costs around £1k (what I built my "top end" system for last Christmas). A bottom end 360 (not including Kinect or anything else, and at 4GB) will cost you £160.
Let's say that you save about £10 per immediately released game as compared to buying it for a console. This isn't counting the simple fact that PC games much more rapidly depreciate in value and will therefore be far cheaper in about 6 months time as compared to their console enemies.
Now, I don't know how many games other people buy within a year, but for me it is around the 50 mark, I suspect. I might be on the high end, I really have no idea.
That's £500 saved from buying PC games instead of console games from there alone. Add that to the fact that it costs £160 to buy a LOW end console (instead of one with an inbuilt 320GB (read: pathetically small) hard drive) and you come out with £660 total to be taken away from the £1k spent on your computer.
So, it costs you, over a console, £340. Within a year, I will add an extra £500 to my saved total and come out at £160 saved. This is over a two year period. A reasonable PC doesn't need to be replaced for three to five years (this is the point where it becomes ridonkulously out of date and usually will not run games) and so you save between £660 and £1660. Total.
Come on, ladies and gents. Give us some positives to PC gaming. :D