Yes I agree. Doing all those repairs that have needed to be done, planting flowers, cleaning up the exterior, replacing faulty outdoor lighting, rusty railings and what not, all make a huge difference in the home and the homes value.
The idea behind it all is to do the work properly for as little as possible while getting that much needed value added to your home.
These exterior things also effect the values of homes around you which is why so many people tend to complain about homes that have gone unkept for long periods of time.
Right now I have been working to update the curb appeal of my old man's place as well as his parents by cleaning up the yards (removing branches and things) trimming rose bushes, power washing the brick and siding, planting flowers and what not.
It all makes a difference.