I like trim, as it often makes the vehicle look more complete. I think deleting it gives a "quick paint and too lazy to put it back look", to me. The exception would be if it was quite damaged/missing, or maybe just ugly/not-done-well to begin with.
Mini-rant/un-popular-opinion warning:
I'm definitely not a remove all emblem/trim and hide the brand guy. I see cars (I'm not as familiar with cars) that have been "debadged", and I have no idea what they are. That doesn't make me think "Ohh exotic". It makes me think, something more like, "oh look, a generic car/appliance", and then when it's treated (wheels/body-kit/whatever) like it's something special, it looks like someone bought a new toaster from walmart, waxed it, put a custom cord on it, and took it too a toaster and blender show.