We all know the story of Peter Parker. We also know that if Ben hadn't been killed, Peter would've never felt that guilt over the loss of his uncle. The guilt also shaped him into the hero he is today, and it's arguably the sole purpose of why he does what he does.
But what happens if Ben never died? May and Ben are alive and well, and Peter still has his superpowers. Do you think he'd be any different than how he is today?