Please, just mess around with the lighting settings. Divide, softlight, hardlight, etc. SOMETHING. It's really difficult for me to get to like your sigs sometimes. They're great, it's just that lighting style. Maybe you like it. But try just for once? As for the tutorial, it's great, but it's boring. Make it more lively, like you're writing a book. Don't be so stiff. Your tutorial isn't that fun to follow, and I'd really only look at the pictures. Good effort, and I like the colors you used as the base for the tutorial.