Personally I prefer the PC. Sure you got achievements with the Xbox live but the 360 does not have a server browser nor chats. That's why I think the PC is unmatched. I've had a Wii, and a 360. I felt boxed in. Once I went PC i really couldn't go back to consoles.

I still think Deus Ex is better game, but I have to respect Half Life for all the commotion it has caused. Personally I found it too easy for some reason, and never ended up finishing it. Hm.

I still think Deus Ex is better but that's jsut me :).