the obvious question is, how long have you been skinning? But also, what did your first works look like?
My first ones were pretty painful looking. Though, on the other hand, I wish more skinners would do things a little more out of the box than what we have nowadays.
Here's some of my first skins:

I did this one nearly 9 years ago. Note the title bar buttons are on the left border.

This is a WindowBlinds skin I did a very long time ago. It had rollup buttons on the title bar and on the left side I had short-cuts to various parts of CNET.com

This Solaris skin is probably one I used more than any other skin. For many years, I used it as my main desktop. I did this one back in 1999.
How about you? When did you get started and have you tried to do anything you felt was particularly innovative and interesting?