Ones I can remember off the top of my head:
Skyrim - in some ways its a great game but lots of small things like merchants levelling up with you completely broke the immersion for me, also found a lot of the backend mechanics either lacking in information or just clunky. (and I always like to do the first place through of a game without mods that massively change gameplay aspects).
Knights of the Old Republic - quit after barely 5 minutes the whole movement/controls felt like you were in a straight jacket.
Skyrim - in some ways its a great game but lots of small things like merchants levelling up with you completely broke the immersion for me, also found a lot of the backend mechanics either lacking in information or just clunky. (and I always like to do the first place through of a game without mods that massively change gameplay aspects).
Knights of the Old Republic - quit after barely 5 minutes the whole movement/controls felt like you were in a straight jacket.