Fallout 3. A very immersive game with unique setting. A game that gives player a real freedom and has the battle system that doesnt get boring too fast thanks to VATS mode. Solid character development system where the way you develop your character and skills you learn affect the gameplay and your experience.
Mass Effect. A game that is Kotor minus Star Wars setting-wise that only pretends that it gives player a freedom whilst in fact remains being extremely linear. A game that features boring, repetative battle system, poorly designed dialogue system where you always know what answer is the 'right' one, uninspired character design and almost non-existant character development system. The game is pretty immersive and features well-designed planets and the main city.
I guess it's clear which one of the two I prefer.
