More than 10 years ago, I've asked Aaron about the best way to tell him "thanks for your job". He said what he has a big wishlist on Amazon, so I've chosen a couple of books and bought them to him. Since then, once a year I have an event in my calendar: "check out what's new on Aaron's wishlist".
Don't know why I decide to write it today but this is a link for this wishlist, just for inspiration. I think it will help you to understand more about Aaron and his personality
https://www.amazon.com/hz/wishlist/ls/2A6HM9B19FOPW/