The Marauders arguing over which House the characters would be in. James bursting out into 'You can Fly' while playing Quidditch. James singing 'Bibbity Bobbity Boo' in Charms while Remus face palms. - Imagine if Walt Disney was a wizard.
Seriously though. James Potter was a much better man than Severus Snape. Whereas James bullied Snape while they were kids and then grew out of it, Snape used his position of power at Hogwarts to bully children.