For piglin oc asks!! What are all their hobbies?
Blitz: Cartography! He likes to draw up maps (and with that explore places to fill said maps). He also likes to gather plants and flatten leaves or petals or other bits within books like a field journal. He'll even have his fox go out and collect things for him. He's also teaching himself how to draw, since he likes making journals and maps and stuff, he thinks being able to recreate landmarks or plants in detail would be useful.
Blink: He's really young so he hasn't really found his niche yet, he likes to copy people and try to imitate them. He's gotten really good at playing pretend and it's one of his favorite games (especially when Burst or Blaze indulge and he gets to use his wooden sword). He looks up to their caretaker a lot, which may hold some future potential (I've been working on drawing they're guardian & he's based on the skin I use in game, as is where they live, its all very much based on a particular minecraft world I have).
Burst: I'm going to aim for more recreational hobbies but I will mention he's quite fond of looting fortresses and breaking into bastions he shouldn't be in. He likes to carve though! Be it wood, metal, or stone. If he can't get his hands on a sword or axe to spar with someone he'll often find himself carving. He'll do anything from small figures to carving words and other things into weapons.
Blaze: Once again I'm going to aim for recreational hobbies but much like Burst he very often finds himself fighting and sparring with people. In his free time he actually enjoys textiles, specifically knitting and stuff. He takes very good care of his sheep, Puff, and that includes shearing him on the regular. He ends up with a lot of wool and has to do something with it. He's also got a slight problem with gold and gambling and he'll go into villages and bet to make as much as he can. He's gotten very good at it! But when he loses well...there's not much else to do but mourn the precious gold he's lost.