Hello, I'm a Drupal developer, have been working with Drupal for 4 years now, all the sites that I make have a custom theme/design.
Coding CSS is very fun for me, it's my favourite part of making any site, so if you want me to make you a theme then I'll make it for you, and I'll make it good.
I have a very good knowledge of Omega and Drupal, and of course I don't make a site that's not responsive, all the sites I make are responsive so don't worry about that.