THIS. That's one of the things I can't stand about MW3, too many unrealistic perks and annoying killstreaks. Not that BF3 is very realistic either, but COD has just gotten very stale to me. Maps are tiny and it's the same thing over and over. I like the variety of things you can do in BF3 and I like the bigger maps - having a little room to move without some douche popping out from a corner every 2 seconds to shoot you is a good thing.