I have to agree with Derek. Looking at other folks work is great to see what other people are doing but being a designer has more to do with having a style that makes you stand out from other designers.

As far as tutorials go, they're fine to improve your skills when it comes to actually using photoshop, etc but doesn't make you a better designer. If you don't have the ideas to design to begin with no amount of tutorials are going to help with that.

As far as your site is concerned, there's just not much to it, it doesn't scream, "Hire me, I know what I'm doing!"