I dunno about you, but as long as you're not driving around town with it on like a doofus, I like neon and lighting effects for show quality cars. It adds to the pop, and grabs attention, especially at night.
I don't really have a reason why I put interior neon in my Regal, bored likely, but I wasn't trying to "impress" anyone, I just thought it added to the essence of my car.
Plus, if you're around some picky person that will think it's dumb, it's as easy as a flick of a switch (unlike vinyls, lol)