For anyone in this thread saying Rocky IV sucks, I'll fight you IRL.
Rocky IV is probably my favorite film in the franchise. Yes, the first film is a better movie, and is a real achievement, but Rocky IV is just so goddamned fun and entertaining. The acting is great, Creed's death brings the feels, the montages set the standard, and Drago is the most memorable villain in the whole series.
Regarding this last part, it was the role of a lifetime for Dolph and he played it to perfection. Not only that, but GODDAMN was he a physical specimen.
I love the whole Rocky series but the only ones that I regularly re-watch are 1 and 4. And among those two, I definitely watch 4 the most. Anyone who says it's a bad movie is quite possibly a bad person.