for me personally, i don't think care about online play. multi-player is one thing, but online multi-player isn't a big deal to me because online play is only good for certain genres mainly FPS gaming.
I really don't see the point of online play in say an RPG, or Adventure and Action games. It seems like online play is only fun if your objective is to kill people and that only caters to those audience which isn't my thing. Eventually online play isn't going to be as fun anymore if your goal is gonna be the same over and over again which is "boom headshot" or "capture the flag, team wins".
as for DLC, well people like to think just because one game has DLC, and the other doesn't, makes that one the better overall game. GTA4 for example. and that DLC that MS has isn't even coming out till next year and that's almost 10 months after the game was released...by then, no one will care i bet because other top tier games have come out.
No one is going to choose which system to buy for GTA4 just for some DLC, they are going to choose based on their preference of the system itself and price, not which has extra content. Even if Sony was the one with the DLC, the 360 version would still outsell it because of its system price and install base so that DLC didn't do a damn thing.
