What I LIKE to receive: Money, birth announcements, wedding invitations. What I usually GET: bills, "Current Occupant", advertisements, other people's mail.
At one time I collected vintage/antique glass oil lamps, usually from auctions on eBay. The most exciting time was when one of those arrived in the mail. For one thing...would it be broken? None ever was. I still love those things, but have learned to control myself.
Cards from my mom written half in yiddish with her telling me how to cook things I've been cooking for 40 years. She doesn't have dementia or anything, she just misses being a school teacher. I put them on the fridge and they make me smile.