I am getting it release date most likely.
What do I like about Gears of War?
The world it is set in, it is actually quite deep, although this isn't shown very often.
The atmosphere (1 more than 2), it felt like humanity was on the edge of extinction.
The artistic style.
The combat system, it's one of the only games to get cover based combat right.
The multiplayer will probably be pretty good as well.
GOW3 is the finale of the trilogy, as someone has loved the first two it's a no brainer that I'd get it unless I thought they were screwing it up. Which I don't.
My only dislike of GOW is that it doesn't come across how Epic intend it to, they try and make it serious (and in the books they succeed very well), but then they throw in a load of cliché machismo crap that really doesn't fit the theme they have gone for.