I also do Christmas ornaments, at some point I will have a Disney tree!
my mom has enough ornaments for a disney tree, just no tree to separate it out on
its great to look at all our ornaments and relive trips (plus the ones my parents took pre- my birth lol).
as for other must-haves, my family is a bit odd in that. my dad literally buys just a hat on each trip (he says he just likes seeing us buy things, but the last trip he bought a collection of disney park DVDs, which is by far our favorite weekend viewing lol). mom usually buys a few new pins for school (she's an elementary teacher and a kid at heart), a shirt or two, and kitchen stuff, like an apron, utensils, and she used to have some glasses but she can't find new ones that she really likes (after 5 trips of shopping
.....maybe this year will be our year). as for me, i buy a shirt or two, some fun trinkets, a postcard to send my grandma, and something for my dorm room. i have so many cute things that my friends love, not to mention disney dishes
and we like to save napkins too. having them at home makes the magic last just a little longer once we're back