painting: outside or inside?

when painting your cars do you paint the inside or outside of the car? if so, why? sorry to make it sound like a lame-o survey question but i wanna know which is the best way to do it.

[SuperFly]

I paint the outside. It looks better. Sometimes I paint the windows black on the inside, and that in combination with the rest of the body painted on the outside looks pretty sharp.

[Aquarius]

Unlike most RC Car Bodies for 1/43 and smaller it looks best to paint on the outside.

[DarkTari]

For blacking out the windows, paint on the inside. Body, paint on the outside w/ a base primer.