It's not relaxing, which is what sewing should be.
Finally I decided to bite the bullet and just do "maintenance" work. Namely, I decided to trim all the bonus HST units I've set aside from various projects. Actually, not ALL of them, since there are a lot, but all the ones paired with a white rather than black or another color. This is what was left after about 650 HSTs:
A number of these in a variety of colors, set on point like this pattern from Quiltmaker, is what I have in mind.