I think a light grey would look very smart - white trim. Be sure to paint the garage door the same color as the house to help it disappear.

The structural part of the back porch looks to be original - at least the brick in the pillars is same as the house. The screening, door, steps, rail, ugly glary light fixture, etc can go though. Perhapsjust leave it as a simple open porch with railing/new steps + nice wood screening around the bottom to conceal the space underneath + a little carpentry to tidy up that wood trim up under the roof + a nice attractive ceiling light fixture + Id rethink gutter/downspout somehow. Contingent on condition of structural elements - not always possible to save everything but its nice when it can happen.

This house has a lot of potential. Find a new home for the trash cans. Replace the entry door and storm door with an updated version ( nothing fancy). The stormdoor should be full glass with the trim painted the same color as the door. Paint the house all one color. sage green with white trim, medium gray with white trim, etc . Then paint the door a nice contrasting color. I would try power washing the driveway rather than doing an expensive replacement. It can then be enhanced with large pots of flowers, etc. If the garage doors are functional paint them whatever color you paint the body of the house. Adding nice, larger lights by the entry door and near the garage doors would amp up the look. Invest in professional landscaping/ hardscaping. That alone will make this house sing.

Several things you could do: Remove the flower bed in front of the door; it’s usually not a good thing to plant right in front of your main entry. Mentioning the front door, paint the bright white trim to match the door. Same on the garage - match the trim to the door. Remove those shutter-ettes from the second story windows. Very obviously fakes. Have you thought of a shade of green for your house body? Samples below. I like the brick and it goes well with your roof.