You all had to mention a module I didn't have...
Now I have one on the way.
What I have been interested in for quite a while is a non-existent analog synth that is GM compatible.
How cool would that be?
Akai did make an analog rompler based on sounds from different analog synths, but it isn't GM compatible and is really pricey and pretty rare.
I looked at the manual and it is unclear if I could set it up to be used as a GM module.
The other option would be to get an analog style VST and see if I could make a decent patch set that I could use.
I just think it would be super cool to hear game music in analog synth style.