I enjoyed playing through both Gears of War and Gears of War 2. Neither blew me away, but they were pretty enjoyable co-op experiences. I've heard from a number of folks who are looking forward to Gears of War 3 because they're hoping it'll capture more of Gears of War than Gears of War 2. That there was such a favorable differentiation between the two came as a surprise to me, but user Pwnproof reinforced what I've heard from others in a comment from earlier today:
"I loved the first game with all my heart,the second one not so much.....So maybe if this one can re-spark the greatness i got from the first one i might grab an arcade 360 (still have my old HDD) but it will have to be a really good game at lest enough to make me buy this system again. If not oh well but i shall see."
Are you with Pwnproof?