As I am cardigan addicted I always make simple top-down raglan cardigans (knitted or crochet, I love both). When knitting, I use simple stockinette and make the border in garter stitch. So, I have a project which is completely mindless for many many rows. The only problem is, that I often find the second sleeve so boring, that I do not finish (ok... eventually I finish, but mostly much later than the rest)
Your hats are super practical and also a good idea for a not too complicated pattern 😊