I like that Marvel went the brave route. I love that Thanos is humanised and has more depth than villains usually get. I enjoy that during the credits a teenager behind me went "Woah, Walt Disney?!" like it was a twist.

I don't want to spoil this for anyone, so I'm going to rank the heroes (in a way which I think avoids spoilers), by most heroic, to ineffectual, to actively hindering the hero team.

Heroic:
1. Thor
2. Iron Man
3. Gamora
4. Captain America
5. Spider-Man
6. Vision
7. Groot
8. Rocket Raccoon
9. Doctor Strange
10. Bruce Banner
11. Black Panther
12. Loki
13. Mantis

Ineffectual:
14. War Machine
15. Nebula
16. Drax
17. Bucky
18. Black Widow
19. Falcon

Hindrance:
20. Starlord
21. Scarlet Witch
22. Hulk