Hand #1: I think the flop would be a cheaper way to put him to the test. Shut down if called.
Hand #2: I would rather call the flop raise and hope to hit on the turn. Don't these stats say this guy likes to pay you off? Why not get it in if you improve? The Q high straight would be nicely hidden.
Hand #3: Gross. What are you hoping to crush him with holding KQo?