I don’t play many games on my PC these days. It’s not a particularly good gaming machine by current standards, with the only upgrades it has had in a long time being purely to get it to run World of Warcraft better, which wasn’t really a technical powerhouse. When I lost interest in WoW and got back into gaming, it was consoles that got my attention, not the PC. As such the only games I’ve played on it in a long time are The Sims 2, the first two Hitman games (which I went back to recently for a while) and pretty much anything by Valve (except Left 4 Dead, which I have on 360).
Though I think Valve are a great developer and I have a lot of respect for what they’ve done for digital distribution, I’m not actually keen on Steam itself. Half-Life 2 was an awkward introduction to it, a game that needed online activation through a clunky service to play the game, without offering any benefit for doing so.