A PC can be just as much a toy as a console. It all depends on how you use it.
PC gamers always seem to think it's more mature to be playing video games on a PC, rather than on a console. Maybe you guys just thinks it looks better, when you're 30+ and you don't want to have your girlfriend saying "Oh, is that a Nintendo? My little brother has one of those!" Instead you can just say, "This is just my computer!"
I've got nothing agaisnt PC gaming, I have a few games (that my PC can manage) but overall consoles are easier for me. Plus, my 360 doesn't get viruses.