Controls for me can make or break a game, bad controls can leave really bad first impressions, Killzone 2 was one title in particular, its a decent enough games but the controls felt so clunky and awkward I couldn't play past the first couple of hours before putting it aside.
Pacing is another thing that is really needed for me, games that just feel all over the joint can be hard to follow and can cause me to lose interest, shooters usually get this one right, it tends to be RPGs that suffer from bad pacing, FFXIII (if you want to call that an RPG) was the most recent game which made me so frustrated I was looking for a fucking 'Fast Forward Bullshit' button.
Lastly as been said before Immersion, and that for me comes primarily by texturing and geometry, nothing kills my immersion more than a really stretched texture, or when a seam is really visible on a character, Fallout New Vegas has had its fair share of this, which is to be expected due to its size I suppose, however it still kills it for me, I don't know, maybe I look at things to closely, checking a small rock in the middle of the wasteland for bad texturing is probably not something the Dev's thought people would be doing haha.