In portfolios I prefer white, black or dark grey as base color. It does not compete with the graphics and photos you are showing. Whatever you deside, use a discrete color, and preferable no pattern - or very discrete!
I like flash for galleries! You should think of a solution that include some alternatives for non-flashers too.
My tip would be to not put in all the websites you've done, but rather pick a few that you feel are your best examples and show those. You can always have a link for them to contact you for more samples. That way, you'll also hear from them and be able to get some contact info to follow up with them.
Also, it only shows your best work and it won't be diluted with stuff you may have done earlier on in your career.
Your colors should probably reflect your website, or it's style. I wouldn't recommend a flash website. I have a very slow computer at home and whenever I come upon a flash website that's slow-loading, I get mad.
I agree with everyone else. Its best to use dark, vague colors so your design examples can stand out. A flash site would be best so when the user is looking at each design it wont take a long time to load.
Try to search a color scheme. do not use colors because you just like it. Choose at color scheme for better site.
Hehe. It seems that he decided to use a basic Drupal theme after all.