I like buying games from Steam when they have sales on, and I like the Steam overlay that allows me to chat with friends while I'm playing games. That being said, I don't like buying retail games and being forced to play them through Steam. DRM is still DRM regardless of all the shiny bells and whistles that come with it.
And for why I hate Steam, unless there's a sale on, it's rarely. fucking. cheaper. It is beyond ridiculous when I can buy discs, with cases and manuals, for cheaper than I can get a goddamn digital download.
Fuck you Steam, I bought that for $49 in a retail store.