What climate zone are you in or where are you located? Can you take a photo that shows the entire front yard? I can't tell where you park or how guests walk to your front door. If you search Houzz for 'entrance gardens' you will see many examples of homes with wide paths leading from the street to the front door. Do you like to garden? You have a lovely house and would not want to hide any of the porch area so keep the plantings around the porch low. You can plant some taller plants at the base of each post but these should also stay low and not get higher than 3' to 4'. It looks like the garage may be in the back of the house with a fence along the driveway. You could have low growing roses along the fence and flower beds at the front of the house if you like to garden. Location and more pictures would help us to give suggestions for the garden.

It's refreshing to see nautical, navy BLUE. Everyone is saying the same thing for the most part - just introduce another color, definitely bright (yellow or orange IMO) and it will make it more current. What I really like is how your style will withstand the test of time - and with minor updates now and then it will always look fresh and "current".

Perhaps a colored door if you paint the home grey. Maybe Red? You could simulate a color change on door by hanging something over the door that is the color like a tablecloth or piece of fabric. If you search houzz for" grey homes", you can see what others have done. My home is painted Cape Cod Grey with white trim and it has been very easy to live with for years. I have a dark grey roof.

In order to suggest specific plants, I need to know what part of the country you live in. There are no shade trees it seems. I would take down the two shrubs at the front of the walk, including the purple one. Sorry. You can get the purple back elsewhere. They are overbearing and there's no symmetry. At the right corner of your home, not too close where the roots will damage the foundation or branches at maturity will touch the house, place a medium sized ornamental tree. At front, left corner, behind the mailbox ( you need a bigger, more updated one), maybe 5 feet to the right, place another tree. Pull out all the plants that are along the house and replace with evergreens, box woods? Just depends where you live. I would also pull out the white ground cover near the wall, just on the right, in order to achieve symmetry. I would paint the cream stucco a shade of gray darker than your roof and keep the trim white. Also, a new handrail would help freshen up the entry.