Hand 1 is fine. Check raise would be OK if you had A) a stronger hand and B) a read that said someone was gonna bet. Here you don't have A, and since everyone folded, you probably weren't gonna get a c/r opportunity anyway beacuse no one here seems to have a hand. Looks good.

Hand 2: call.

Hand 3: fold without an impecable read. Middle pair is middle pair.