Credit where credit is due. Note that some entries may have both positives *and* negatives mentionable in this and the "DRM Nays" thread.
Sacred 2
1. You can install this game on 2 systems off a single CD.
2. A wealth of post-release patched game material (levels/quests, creatures, items, etc.).
3. No DVD required in the drive to run.
Prince Of Persia
1. Not interested in this one myself, but if EA is releasing it DRM-free, thats certainly laudable.
Left4Dead
1. Combined with the Friends feature of Steam, playing this game without the DVD in the drive is a painless blast. [No-DVD-in-drive is the point of this bullet...]