... have I (as a PC gamer) encountered crappy console conversions. Three examples off the top of my head:
Mirrors Edge: Yes, you could configure the controls, but in-game they were still referred to by their Xbox 360 identifiers. I.e. you could set jump to space, but in the tutorial it kept referring to non-existant buttons. Made the game virtually impossible to play since you'd get confused by the bad labeling.
Blur: Insane keyboard controls and completely unconfigurable. You had two keyboard layouts to choose from, both pre-defined and written in stone. Or you could use a 360-controller. Completely retarded. Various references all through the game telling you not to turn off your "console" while saving.
Assassins Creed: Completely un-intuitive console controls. Impossible to change.
Feel free to provide more examples.