Deus Ex: Human Revolution has been the only game that I can remember dislodging Team Fortress 2 from the top of my "Friends' Gameplay Stats" list on Steam. Team Fortress 2 has been resting there at the top for as long as I can remember, so it's testament to how hyped people were to get their hands on this long-awaited prequel.
If you've been having problems with the PC version, then Eidos Montreal might have the answer to your troubles. There's a hefty looking patch on the way that's going to be fixing some issues and even adding a couple of extra little features too.
I love the descriptions in this patch: "Fixed an issue where doors in Omega Ranch sometimes wouldn't open." Yeah, I can see that being a problem for some people. I haven't played the PC version myself yet so I'm not sure if this patch is going to fix any big issues. Hopefully Human Revolution runs nice and smooth for you all so you can carry on making "art."