I used to draw with pen and pencil a lot as a teen. I'm glad I've kept most of what I did. I sporadically get creative from time to time, but don't have nearly the amount of spare time and excess energy I did.
1988 Sketch based on one of many Fictional worlds I created,
Extreme alien technology blended ecologically: "Maldon"

1989 Arty initials based on Celtic alphabet which are tied to plants/trees.

2003 A recent sketch, one of many many many sketchs based on a fictional world
of spherical Droids. I first started creating these guys the early '80s.

I've written a complete turn based game system, which I play tested repeatedly
with friends. It includes maps and missions set in one of the droid worlds I came
up with, titled "Expulsion". However my recent sketches I make have little to do with that system.
A sax playing droid would be very unlikely in a world of anti personal Plasma cannon toting war droids.