I know, I know - always late to the game. But played the fist couple of sections of each last night and enjoyed both. GTA4 has a better storyline and more variety from what I've seen so far - and the music and voice acting are great. It really pulled me in - I felt as if I had a starring role in the Sopranos! Although I think I'll complete both, I'm guessing GTA4 will provide the more memorable experience of the two.
Which games have you started recently that have 'pulled you in' - and what is it about them you find appealing?