First Skin...? get outta here... your obviously gonna make some very nice skins in the future! - I'll look forward to that so will many others im sure, im sure you don't need me giving you some advice, but i'll share some of the guidelines i use when i think about designing a skin for vB...
KISS, Keep it Stupid Simple! - I try to use very small (filesize) graphix to reduce bandwith overheads and as such i take this principle and apply that to the design, i think...how can i make something stylish with minimal fuss... either dark or light? (thats my first question) then start with the alt1, alt2 colours first which i spend time working out how they compliment each other...anyways, i've started to go towards designing skins which have an exisiting theme/influence on my design, my C64 skin is eveidence to that...next? maybe an Atari 2600

who knows.... nice skin btw!
-b6