mechmouse: Like you I'm not entirely against DRM. However Steam's DRM gets right in the way for me.
If you're a single gamer, it doesn't get in the way. But if you've got family that game, then it really gets in the way.
If I didn't bypass Steam, I'd be booting one of the kids out of games every week.
I'm opposed to companies using DRM, but like many things in life there is room for compromise. Steam doesn't use any DRM itself by default, it's up to the developer of a game whether they use Steamworks CEG DRM or not. There are DRM-free games on Steam also, and once they're installed they can be ran similarly to GOG games. Some of the games
are actually GOG games, such as Tomb Raider 1/2/3 for example, complete with the gog-launcher.exe file. Of course some people consider the fact they have to even download and install the Steam client itself to be DRM, so if someone feels that way about it then depending on how anti-DRM they are they may want to forgo Steam entirely.
I use these two resources when deciding whether or not to purchase a Steam game (directly or in a bundle):
http://steam.wikia.com/wiki/List_of_DRM-free_games http://pcgamingwiki.com/wiki/The_Big_List_of_3rd_Party_DRM_on_Steam For me it is a matter of coming to compromise by weighing the benefits versus the cons for a given game on Steam. Certain companies I have blacklisted outright (not counting free games), and I always consult the above URLs to help make my decision. Any game that has multiple forms of DRM such as Tages, SecuROM, Starforce, GFWL or other 3rd party proprietary DRM systems I simply will not buy consciously (however I've made unintentional mistakes a few times).
For games that either don't use DRM on Steam, or that use CEG in a mild way I don't have a problem with so long as my gaming experience is unhampered. Always-online DRM is unacceptable to me for example (MMO/MOBA games excluded), and I frown upon games that require me to make additional 3rd party accounts, however in some cases I may be ok with making an account on the game company's own website/servers (such as Torchlight 2 for example). That is about the extent I'm willing to bend on DRM though for games on Steam. I wont buy any games on Origin, Uplay or Blizzard's Battle.net however as I don't like how they handle DRM and don't care for their software either, although I own a bunch of free games on them.
In short, I'm comfortable with 1999-2003 era DRM systems mostly as they were not terribly intrusive in most cases, or there were easy ways to work around some of the problems they may have caused, but the insane extreme anti-consumer DRM that is on many games nowadays especially from Ubi, EA and Rockstar is just totally not acceptable to me. :)
My games and computer are not shared with other people so I don't have to deal with any issues that arise from sharing personally, but it was nice when we used to be able to install a game on multiple computers and have LAN games without needing separate license keys for every single machine, even if the other installs were multiplayer-only. I don't play multiplayer enough now for that to really matter that much though either.