I do love that Cameron is the one guy that Vala's teasing seductress act has no effect upon, other than sparking the equivalent of a bored "yeah, whatever."
and those lines are very like early Crichton in a lot of places, although I will give Cam credit as a credible soldier, which Crichton never was.
I don't see the two characters as much alike at all, beyond impulsiveness and maybe a few pop culture references. John Crichton was one of my favorite fictional characters ever, but all too often I'm left with an impression of Cam as an unlikeable entitled fratboy dick. He breaks out of that with his comfortable camaraderie with Sam and his admiring man-crush on Teal'c, but those moments don't come often enough.