1st = Good, not great. A bit repetitive.

2nd = Excellent. A massive improvement.

Brotherhood = If you like 2 you'll probably like this one, because it's basically the same thing, with a few tweaks. It's also the conclusion to the story that began in the 2nd game.

1 was okay, but 2 just made it so much better.

Brotherhood works best when directly following playing 2.

awesome, but it got repetitive. I've heard great things about the second one and Brotherhood though, so I guess I'll have to grit my teeth and power through the first one