I much prefer getting to know a custom character as they make in-game choices to playing a pre-defined character who I don't really know. As for additional content for custom characters, I'm much more concerned that it won't quite fit my character than I am about custom characters somehow being lacking.
In multiplayer we all enjoy the fun game of "hunt and kill all the custom characters". Only with Gale we usually just knock him out and swipe his clothes.
