An alternate universe version of Diego Brando that has The World came out of nowhere and was the coolest idea for a final fight they could've had. I will admit that his death was sudden, but then again, how else were they gonna beat him?
As for part 7 itself, it was amazing. It's long length and setting really went well with Johnny and Gyro's
Yaoi bait bromance and they're probably the most fleshed out JoJo protagonists because of that. It's kinda like what Araki wanted to do with Joseph and Caesar in part 2, but was able to better execute it. It's not just Johnny and Gyro who were great characters, Funny Valentine marked the first time I actually felt bad for a villain in JoJo. His entire plan was made not because of his own desire to rule, but because he loved America and wanted to see it as a utopia, protected from any enemies around the world. In contrast with DIO, Diego was someone else that you can actually feel bad for since this time it actually WAS his painful upbringing that made him into the bastard he is.
Is part 7 my favorite part? It's hard say given my love for parts 4 and 2, but now that I've finished it, it's on to part 8: The new hero has 4 testicles!