Hi Dom,
I like your work.
I visited your website too. Really nice work you have there. :bounce: :bounce: :bounce:
Youre far a better artist than me, no question, (Im just a hobbiest) but I have some critics to your concept.
Your artistic skills are obvious. The sketches are beautiful - there is enought tension and drama, modeling is awesome - details and imagination.
The main concern Im having is that your second sketch is more like a character drama than a Grand Space Opera theme. I think you have to put something in the background to bring the two characters closer to the theme (a battleground after the battle, lots of wreckage, maybe some ships fighting against or trying to destroy the huge cannon, or anything else that can tie the two characters with the Grand Space Opera theme. Its not necessary to be a conflict. I understand that you try to avoid the classic war and massive battle themes.
Maybe my Space Opera theme knoledges are not good enought, but I must say that it will be a sin, with such great skills you have, not to qualify because of the theme. I`m trying to be as gentle as I can, so … please accept my appologies if I was rude.
Good luck Dominique!!! 
Looking forward to your WIP.
P.S. - maybe you have something in plan regarding my opinions. If so, it means that my concern is not a an issue.
- I was really asking myself to post or not to post my opinion. Im affraid not to be misunderstood - Please excuse my english spelling, english its not my strongest point.