An inspiration for me has always been the constant source of artwork that floods the internet. Before the interwebs (and even during, I must admit), I would escape to a bookstore and search through any art book I could find. DeviantArt.com has been a life saver in the last few years, allowing me not only to save money but to keep the images I so desperately horded.
Spread across my hard drive are dozens of images that I have saved that, while not direct representations, give me glimpses of my characters, aspects that (if I'm going to be completely honest) months later I'll go back through my archives and have no idea why I chose that image to represent my main character. Maybe it's just my way of building up that character in my mind and, once he's solidified, I no longer need the artwork to lean on as a crutch.
I'd love to show you all the artwork. Somehow I don't think it'll have the same impact on you as it does on me.