Currently I'm both types.
I have genes that are being used for specific projects and some random genes that I have no concrete plans for.
My ultimate long term project is double recessive clown hypo combos. I currently feel like I have a good mix and base of those genes with my clown, pastel lesser PDH hypo clown, pastel het clown, and pastel hypo, and black pewter het hypo. I'm going to pair the clown to pastel hypo later this year for some pastel double hets.
I want to integrate my fire yellowbelly into that project as well. She's not a het, but an excellent example of her morph.
I also have pet only ball pythons of whatever random genes that I have no intention to ever breed.
Then I have a few other single gened animals that I was originally going to breed together but I'm not certain I want to pursue that any more since I want to concentrate on my double het project.
Eventually, I might consider putting them to the clown or pastel hypo or a future double recessive animal to continue the theme of the project.