Some people like it one way, some like it the other. Personally I like having the option to have the lights on.
I don't know if this was a passing question, or something you're really pursuing, but we have an electrical guru by the handle "coolerman" who makes a lot of custom wiring solutions for the Xterra. Do a search for "coolerman cibs" on the internet and you'll find him. I'm sure he could wire up what you want.