Today I finished my skin number 500.
I started on my first skin, a WinAmp skin, back in 1998 but never completed it. (It looks -shit-)
Since then I've made skins for 52 different applications of various sorts, some of which most of you have never even heard about.
My favorite was WinAmp for which I've made 30 skins, before I got into Windowblinds. From 2003 - 2006 I ended up making 56 WBs.
I quit active skinning back in February 2006 after finishing the 5imple WinAmp skin.

Since then I've 'discovered' RightClick (in 2008) which sorted rekindled the skinning-bug. I have released 23 RightClick skins, but have made 73 in total. I only skin for personal use now. All the RightClick skins I've made are based on other skins, mainly WindowBlinds.
You can see a few on my unreleased RightClick skins in the desktop screenshot below - which also shows my first completed WindowBlinds, WFO, also unreleased, finished back in late 2003 shortly after I got headhunted to the Wincustomize Mod-crew.