For players following the Japanese meta, OP-10 cards provide key support pieces for Blue Doflamingo decks (led by the OP-01 Doflamingo leader, OP01-060), which dominated the early OP-10 format before a ban list update reshuffled the tier list
Items that only cover the face and not the top of the head, such as a face mask, are also not hats
The trample and flying keyword abilities do make it more likely to do combat damage to a player and also survive multiple turns
I'll leave the comments open below so you can tell me what your favourite goblin is and tell me how wrong I am for not including it.
This ability will also copy the next such spell or ability that you use this turn, which can be a very powerful effect with the right cards
Once per turn, during the Standby Phase: You can target 1 Level 9 or lower monster in your GY