I've got 5 alts at various points in the story, and a couple with no progress to poke around on other servers.
I original made them to re-experience the story before New Game + was a thing and to see all three starting city stories. Now they're just for when I feel like being a different race or gender.

Eva is my only endgame character as I don't want to try keep up with the weekly grinds on multiple characters.