Funny this should come up, I have been feeling the same way myself and had started putting together a little crimbo shopping list, I'll share it with you all and hopefully I don't out anyone.
I'm told Veracity also collects;
rubber emo roe
strings of blue, green and red beads
tiny bust of Pallas
Tuesday's Ruby
and valuable trinkets
Holatuwol also collects;
hyperbolic plasma focuser
9-ball
and I have a note about limes and Wint-O-Fresh mints
as well, but this is from a long while back so that may have changed.
I don't have any notes on jason (seventh). He doesn't appear to collect anything...except trophies. He does appear to lack the 99 red balloons trophy. If we all gave one or two....
Asturia doesn't appear to collect anything specific, but I notice that he has a incomplete KWE trading card collection, he is missing 8 of the 18.
DoctorRotelle collects spices and canopic jars, apparently.
Zaranthos (not Zaranthos) seems to collect Double Bacon Beelzeburgers???
LuvLuvChef doesn't seem to have a specific collection, but appears to enjoy a Mae West more than just now and then. When asked what he would like he asked you to get H or V something, instead.
fronobulax has a large collection of evil golden arch
Bdrag0n seems to collect tiny plastic Bonerdagon
Macman104 collects thin black candles and the letters (Metallic A's, Heavy D's, Original G's, Lowercase N's, and Ruby W's)
Magininja can't seem to narrow it down, but does have an impressive amount of magical ice cube with a fly in it
dossy seems to enjoy a delicious salad, either that or there are so many in the display case because he hates them.
fewyn doesn't seem to have a collection either, but appears to enjoy a shot of flower schnapps.
I collect Tiny Plastic Grues, but please don't feel like you need to get me anything. The piddly amount of work I do, I do as a service to all of you who enrich my life with this amazing program and the scripts that tease my brain and make my life more fun, and my ascentions less tedious.
I'm probably missing a few people. My apologies.
My list also contains Paragon99 who is a mystery and Zarqon who likes all things batty.