While I'd be renting both anyway, I'm more interested in MAG than I am for Modern Warfare 2. I don't think MAG is as bad as people say (not counting certain issues like bugs and balancing), but I would agree that it's something that has to grow on you after a while and you need spend your first skill points wisely so that you can level up A LOT faster *cough* revive ability nets you 10xp a revive.
Of course, it also helps that things like command structure (Battlefield), respawning in waves (HL2 mod Insurgency, Red Orchestra, and Day of Defeat if I recall), running speeds based on armor/equipment (Counter-Strike), non regenerating health (LOL), large maps (Battlefield), ect are things that I've already experienced in other games and why I'm not ripping the game a new one like some people and preview/reviewers are doing.
If IGN said that there wasn't much fun in MAG, we must have been playing a different MAG then.
