I quit a few years ago, but I always did fruity/menthol juices in the spring/summer, and more mellow/warmer flavors like butterscotch and so on. Didn't know that wasn't a thing with disposables.
Discussion
Yeah. You can make any flavor juice in as small of a batch you want, so you can do flavors that might not be big sellers. But to make a disposable you have like a million unit run produced in China so you're only going to do popular flavors and the fruit flavors are most popular. So most disposables are fruit and fruit/menthol.