I didn't mind the crappy story and characters. I did mind that the PC version was twice as long as it should be for the limited variety in gameplay. But that's not a fault unique to Gears of War. I'm still surprised that Valve felt the need to include yet another "pick up object with gravity gun, drop it in hazardous water, jump on it, pick up other object, drop in water, jump on it" sequence in Episode 2.
Seriously, people. Stop this ****. I don't care how fun you think the sequence is, I can only take so much of doing the exact same thing in new environments.