I have loads of patience when it comes to adventure style games but hard parts in fps's and similar just annoy me, doom 3 was starting to do that near the end as I reloaded for the 60th or so time and tried to avoid falling in the hole , getting stuck or running into a bad guy whilst trying to move backwards away from the big dude
going along the same lines I nearly always start FPS's in normal or easy mode and once I have finished them it is very rare that I go back over them as it all seems pointless to me doing the same levels again but just having a harder time. also games that restrict your saves get a big thumbs down.
I played about two thirds of the way through 'american mcgees alice' before computer problems that led to ( due to my mistake ) me losing all my save games when I realised this I stuck the game on the shelf in disgust and have never gone back to it