I use steam because it's convenient and has a lot of sales. I also use it because it makes connecting with my friends and playing with them easy. It also makes it easy to for me to get games, as I don't have a local store to get hard copies.
I don't like the DRM, at least everything I've seen of it. I disagree with some of what Steam's done, this being a case in point.
In the end though I'm tired of all of the 'fuck steam' bull shit so I guess I'm not going to continue checking this thread.