I agree with what has been said above, for the most part. And I think A67 made a good point when he talked about new skinners. I know I myself have been working for months to develop something I felt would be good enough for my first submission. I definitely want to do some new and different things. The suite I'm working on now will definitely qualify in that regard... whether it will be accepted remains to be seen.
But before I could get to the point where I felt I could really try new things, I had to learn the basics. And the way I've had to learn is by trial and error, tearing apart the work of others and seeing if I could build it again. Consequently, a lot of my 'practice' skins look a great deal like someone else's. Between my regular work, and family, that has taken a while.
So it's only now, after several months, that I'm beginning to feel really confident enough with the mechanics of Skin Studio, Icon Developer, and the various apps to be skinned that I'm finally producing some things I feel are close to being worthy of submission. It isn't that my 'practice runs' aren't of decent quality, in my opinion, I just don't want to submit something that people look at and think... "Hmmm... looks a lot like So-and-so's work."
I've seen several new skinners take a different path than I have chosen, and as A67 mentioned, their first submissions seem inspired by one artist or another. There is nothing wrong with that approach... I just want my submissions to be my style from the beginning.