please help me come up with a new username

What you could do (and I do this for online games a ton) is pick your favorite color and then add your favorite thing to the end, e.g. CyanFlight

A similar suggestion to Rocket's is to choose a word, item or memory of something that is woven deeply into who you are as a person and add an adjective that you feel fits your personality or disposition before it. If you want you can add the in the beginning or keep them as separate words with a word to connect the two into a statement For example, I would be “The.Inquisitive.Key”

thanks my new name is @flintlockgames