As for lighting, I'm not going to critique - I haven't done portraits, so it wouldn't be fair.
What I do think, though, is...
In 1 - background is cluttered and may have been a little better with just some music there (Out of focus, yes). The way he is gripping the instrument looks clumsy. He looks like he's about to batter you with it for taking his photo!
In 2 - Better more natural grip on the instrument. Music is good (just a tad blown). The background near his head is still cluttered - looks like stuff is going to fall, so it's attracting my attention. Again, he looks none too pleassed to be there.
Is the intention to promote his trumpet (?) playing? If so, shots with him actually playing might be nice? Or at least photos that look like he is enjoying himself a little more?
By the way, my photos are far from perfect, but I'm being honest about what I see in these shots.
Cheers
craig