I thought the game was complete crap when I first played it. Didn't like the levels, didn't enjoy the feel of the game, thought the gunplay was all wonky and shit. But since my brother borrowed my Uncharted 2, I decided to give MAG more time to see if I could move past my first impressions of the game.
After playing through a healthy amount of games, I can honestly say I'm starting to enjoy it. Really enjoy it, in fact. When you start to understand what the game wants you to do, it really opens up for you. For instance, when I first started playing, I was treating it like your typical fps multiplayer game. I kept wandering away from my squad, lone-wolfing it and looking to just rack up kills. But I could never kill anyone that way because everyone I encountered was always in a group, or accompanied by one or two other people. I rarely found anyone on their own, like myself. When I started to travel with my squad, my kill count really started to go up, not to mention it started to dwarf the number of deaths I kept accumulating. I went from 1:2 or 1:3 k/d ratios to 2:1 k/d ratios just by sticking together with my squad.
Also, I never did any of the objectives, which probably led me to lone-wolf it on these big maps, since I didn't understand what I was supposed to do. But once you start to understand the big picture and realize what the game is truly about, something just clicks and your like, "ohhhh, I get it now!"
Not using your iron-sights when the enemy is close to you also helped to increase my survivability and up my kill count. Shooting from the hip is far more preferable during close encounters, and it feels good too. It's not Killzone 2 shooting from the hip good, but it's good enough.
So, after spending some time with it, this game went from a "who cares?" to a "I really might buy this game now," which is remarkable because I was lukewarm to this game from the word "go." Nice job Zipper, the beta alone may net you at least one new customer.