The Banner Saga
I have tried a couple of other games through Steam, and do not like buying any game that uses it as their software protection.
Steam constantly updates, and will overwrite your installed software without even asking you if you're okay with it doing so. In my case, it deleted the driver for my computer's BluRay burner, then installed some other bloatware that I couldn't permanently delete -- as soon as I uninstalled the bloatware and then started a game running through Steam, the bloatware was back!
I tried working with Steam's support, but the people I talked to seemed to be more interested in pretending to be Sherlock Holmes than actually fixing their software so it didn't try to take over my computer. I finally gave up and decided to never purchase any game that used Steam.
I was intrigued by the game's seeming simplicity, and the interface looked workable, although Banner Saga strikes me more as a game for hard-core micro-managers than for casual gamers. The price tag isn't bad, but I'm unhappy about having no hard copy as a backup.
I'm not at all keen on re-downloading 3 gigs of data, should the drive get corrupted or Steam really bollixes the OS while it's overwriting essential stuff and loading on junk I never wanted. As I said in the summary, Steam sucks!