First of all, I love your car drawings. Some of them are just stunning. I imagine your drawings can make many proud car owners very happy!
Now some remarks and suggestions. Your main offering seems to be drawings, not just prints, so your website's name doesn't do your business full justice. Perhaps you can add a subtitle, something like "Original Drawings and Signed Prints".
I find the fades-to-black on the home page flash movie too long/slow. You use a different font on the home page. I agree with Pauland's suggestions regarding the 'about me' page, the 'big white squares' on the gallery pages and page titles & meta tags. On those gallery pages, the thumbnails are not always lined up, nor are all borders of equal size.
Regarding your 'links' button, I suggest that you create a new page -- called 'links' -- explaining why you included those links and then have the links to these other pages on that page. People, then, will not be directed off your website inadvertently.
You could add (a) page(s) telling people how you work, informing them that you need pictures of the car, how long it generally takes for you to make a drawing, the size of the drawings, what options they have in terms of matting and frames (size, color, etc.), how you ship the finished product, how much personalized drawings and (additional) prints cost and how they can order them.
Hope this helps! Good luck with your new on-line business. It looks very promising!