I finish FF13 but didnt manage to finish all the side missions, bored to death farming to level up and I give up.
If you like FF style RPG, try resonance of fate. very nice game with super steep learning curve but very rewarding game play. Spent like 60 hours smashing it and probably only complete less then 50% of the game, good fun value for money.
If you like Assassin Creed get Uncharted2, its heaps better, but I still like Metal Gear Solid more due to the more open concept of game play and you can complete the game with different style.