I only own 3 of those games so those are the three I had to pick lol.
A few of them i played at friends etc a few times but they still would have beaten my pics(well because if I had liked them enough when I played them I would have bought them).
Imo Jedi outcast or Acadamy should replace kotor, I could not play that game at all, was bored shitless in about 4 minutes and never turned it back on( but i cannot stand that gameplay type so there is that too)
So for me it was max Payne, mass effect and assassins creed
On a personal list there are so many games that would have been much higher priority than those choses we had.