Here is my list, but keep in mind that I never actually lived in STL, but visited there many many times and had friends to lived there. Most of my memories are from 1994 to 1999.
Going to my first concert (Pointfest 95)
Going to every ska music show during the great ska boom of the mid 90's at places like The Galaxy, The Side Door, and the Hi-Point, and every once in a while, Mississippi Nights.
Watching the Blues beat the Red Wings in OT for my first hockey game back in the early 90's.
Going to the Parkmoor of of Clayton Rd.(I think?) to get a shake and cheeseburger. Man they had great shakes.
Going to Llywelyn's Pub in the Central West End to get some delicious fresh chips and to drink my favorite brew on tap (Woodpecker's Cider).
Eating at Rossino's (We would always order the cheese toasted ravioli for a starter).
Ted Drewes, but actually I enjoyed Crown Candy Kitchen more.
Hanging out at the South County Denny's after a ska show.
Riding on the Metrolink just for fun (I'm a bit of a light rail fanatic).
Getting White Castle's to go from the one on Vandeventer and then taking them to my friend's place in the CWE.
Playing on stage in front of hundreds of people at the Galaxy during a ska festival (I think it was called Son of Skaorama).
Watching movies at a Wehrenberg theater and always getting a kick out the the Wehrenberg theme music before the movie started.
Enjoying the very comfortable seats at the Tivoli theater.
Going to Vintage Vinyl to get the latest ska cd's.
After buying these CD's, heading over to Fitz's to get a cold Cream Soda.
Riding the Screaming Eagle a dozen times in a row a couple of times each year.
Sharing an extra large IMO's bacon pizza with my best friend (There would be nothing left).
Discovering the wonderful grapefruit soda called Ting at a restaurant called Duff's(go there for brunch!) in the CWE. Then buying it buy the case at La Tropicana Market near Chippewa St.
Going to Blues and Cardinal's games regularly.
Finally, my favorite memories are my newest ones where I come back to STL to visit with my family to share some of these experiences with them. We only were able to eat at Rossino's once before it was shut down, and they were never able to experience the Parkmoor.
Finally a couple of unfortunate experiences from STL was watching the Arena be demolished in person, and having all my cd's(about 200) being stolen out of my car during a ska show.