How far to go??? (prep and paint)

The paint on my dart is overall in excellent condition. However, the previous owner left me a couple spots of filler (maybe six inches each) and a few areas where he took a little sand paper to it and scuffed up several square feet on the top. The trunk lid also needs to be completely repainted. There's also a hand full of the usual tiny dings that need to be fixed.

My question is would most guys just address these problem areas as best you could, match the color and call it good. Or move in the direction of repainting the entire car. Probably no wrong answer, just curious what others think.

Thanks!