Fable 2 - Game killing bugs. Crappy NPC AI. No sense of achievement. Poor quests and poor quest system. Very easy combat and rubbish spell system. *I didn't get Fable 3 after this mess since it looks exactly the same and reviews even mention how everything is handled the same.*
Oblivion - Terrible combat system. Empty world. Caves were copied and pasted and while a few copy and pasted things can be forgiven, this cannot since 200 caves were pretty much all copied and pasted. NPCs were boring, had terrible AI and their voices became repetitive which made them even more annoying. No secrets to be discovered, every treasure piece always was part of some quest. You wouldn't just be exploring some random cave to find a legendary item. Story was too short and boring.
The Witcher - Terrible combat system. Stupid NPC AI. Uninteresting NPC dialigue. Poor main character, poor skill tree system and terrible story. Some dialogue also seemed broken at times. When I played through, I kept stopping and going to play something else before eventually coming back to finish the game. That's how bad it was for me.
NWN2 - Poor sequel to a great game. The camera is a mess. Even patches haven't fixed it. Annoying companions, annoying NPCs, boring quests and stupid animations.
Fallout 3 - By far the worst. The story was so boring, uninspiring and common that I didn't even feel obliged to continue with it. Side quests weren't really interesting and the world was just empty and there was nothing to explore. All underground areas that were explorable were just copy and pasted areas of the same sub way station. Combat was terrible and bullets seemed to fly left and right and never straight even if you stood in the same spot and fired in short bursts. Terrible game and just like Oblivion - it used the enemy level scaling system.
