Okay, most people typically associate with either "grandmacore" or "grandpacore" -- but for my sanity, I am lumping it all together!
Grandmacore: Values a soft, comfortable life. Embraces hobbies like knitting, crafting, and gardening. Often overlaps with Cottagecore and Soft Academia.
Grandpacore: Appreciates classic skills and leisure. Is into argyle sweaters, vests and flat caps. Loves chess, gardening, and woodworking.

Both are wholesome (even if one of them is grumpy...) and nostalgia driven.