No, Klavier's still definitely pompous and an asshole, what with his constant need to bring up his band, his money, his women,and his music. Not to mention he air guitars in court and punches the wall for no damn reason all the time. He's missing the teeth that Edgeworth, Von Karma, Franziska and Godot had, but isn't funny like Winston. Klavier's just Edgeworth if you watered down all the things that Edgeworth has and threw in the most awful song the player must endure repeatedly.
It says a lot that in eleven notes Dick Gumshoe wrote a better song for the Blue Badger than Klavier Gavin did his ego-named band.
I could only agree on the air guitar as the thing that irritates me about him, since hitting the wall similar to other proesecutor court room habit like Edgeworth hit the desk (normal), Franziska whipping (irritating), or Godot with his cup of coffe (awesome). But his ego, well that's the point of his character. The similarties of Gavin Brother not just from their look, but their huge-ass ego as well.
As Kristoph Gavin prepared a forged evidence so he couldn't lose to his brother, and ruined the life of a man that replace him as the client attorney.