Thor: GOOD: Mjolnir. He won't think it's good. In fact, he won't even try to touch it. But it is good, and hopefully he will get to a point where he will try to pick it up. BAD: His world's Loki's helmet.
Bucky: GOOD:His identification dog tags from when he was in the army. BAD: The red notebook with the star on it that had all the horrible details of the experiments done on him as the Winter Soldier.
Remus: GOOD: A dozen vials of wolfsbane potion. BAD: A baby blanket with HJP embroidered in it.
Gwen: GOOD: Her smartphone from home. It can't load anything or make calls, but she can view photos and play music on it. BAD: The scrapbook Aunt May has of Peter and his love for Spider-Woman.