Keep it original.
If you want another coloured car buy one in the colour you want. (good reason to get another...."But Honey, this ones red")
Colour change cars unless really done well always show their original spots, especially when you get a chip or two.
Original colour cars have a better resale value, even if they have been repainted as opposed to a colour change.
If you have to change the colour, paint it the same shade of colour it is now. IE green over green This will help hide any chips that may/will develope.
Colour ChoicesLast...It's your car do what you want with it........