Crusaders of Might and Magic - Mostly running around, bland environments, texture errors (i.e. getting one of those textures that kind of "record" where you look. i can't explain it), always choppy gameplay even on a Pentium 4.
Fighter Squadron (WW2 era sim) - No tutorials, extremely long missions, I had to go ONLINE to find out how to use my bombs... basically all it was good for was flying around aimlessly. Although for some reasons the wings kept flying off of one of the bombers for no apparent reason. =/
Bang! Gunship Elite - Bad controls, some of the enemy capital ships looked like SD Demon ripoffs, extremely hard missions even on Easy... etc.
The Harry Potter games - Don't get me started. (plus i was like 10 when i bought the first one.