Tony:
He takes you an a vacation to your dream country
Steve:
Steve buys you a golden retriever
Bucky:
Bucky bought you roses. Lots of roses.
Thor:
Thor bought you a necklace with a little lightning bolt
Peter:
He took you to the amusement park that was new
Clint:
Clint bought you adorable bracelets with couple quotes on then
Loki:
He bought you a ring with a green genstone. Because green is also his colour.
Pietro:
Pietro bought you the shoes you wanted for a while now.
Bruce:
Bruce took you out for a dinner in your favorite fancy restaurant