Ideas?

[iAcid]

Hi, guys!

Been meaning to get my own custom skin one way or another. Initially, I was just like I'll post a thread to request that someone make me a skin. 

Then, I saw a gracious forum thread by @run SPOT run  and I was like why don't I try making my own skin? And so, I attempted/am attempting to do so. 

Only problem: lack of ideas/imagination

I made an absolutely creative--not really--move by going to Google Images and then typing 'Acid'. As a result, I got some rainbow optical illusions that made my eyes go nearly blind. In addition, I was shown  a picture of an orange slice

Anyway... I'm open to all recommendations! It might be a little vague asking for help coming up with an image without any specification/qualifications, but I hope to receive enough of a list of general categories of images I could/should use, then narrow my options down from there
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Goal of this thread:
Receive enough input from others to come with a good idea for a custom skin image