I usually use the editor default [colors], and If I'm lucky enough to config colors I ... hey wait I don't.
When I was trying out E I noticed the default (iirc) color scheme was black bg and different colors (or perhaps I changed to this one..). At first it was unusual, but then after trying it for a while I realized it makes editing files so much easier (very much like to do with the syntax hi-lighting), for example you go to edit a .ini file in E, it's so easy to tell sections and variables from stuff you don't need to concern your self with.. So I think colors definitely help if set up correctly
So.. some people use dark and light, or light on dark. I myself haven't joined any side yet