need help with headshots

Hello from Utah,
I've been out for a while taking care of my dislocated shoulder; dislocated it twice while shooting snowmobiles at Widowmaker and Bear Lake Hillclimbs. Took last week off to heal and may go to the next event 3 and 4 March. While I was out of commission (just a bit slower) I've been practicing my headshots. I have two very patient models in my sons. Here are a couple shots that my wife loves but I think there may be something missing. What do you think?
I don't like sepia but this one isn't too bad; maybe a little hot on his forehead.
Although not a headshot, I'd still like to know how you think I'm progressing.
I am bound and determined to make photography my vocation.
Thanks a million.
David
I've been out for a while taking care of my dislocated shoulder; dislocated it twice while shooting snowmobiles at Widowmaker and Bear Lake Hillclimbs. Took last week off to heal and may go to the next event 3 and 4 March. While I was out of commission (just a bit slower) I've been practicing my headshots. I have two very patient models in my sons. Here are a couple shots that my wife loves but I think there may be something missing. What do you think?
I don't like sepia but this one isn't too bad; maybe a little hot on his forehead.


Although not a headshot, I'd still like to know how you think I'm progressing.

I am bound and determined to make photography my vocation.
Thanks a million.
David