Don't pay too much attention to realtors and their obsession with the mythical "average buyer." Their advice sometimes backfires. I've never bought a house because of the way it looks; I buy it because of the way I think I can make it look. I usually start by stripping the place to the bare bones.
A former owner once came to pick up some mail after I had bought his house and was removing all of the wall-to-wall carpeting, taking the paneling off the walls, and removing the fake brick from around the fireplace. He told me that he had taken his realtor's advice to make all of those "improvements" in the month before he listed his house. I was too polite to tell him that I would have offered much more for the house if I hadn't had to consider all of the time and trouble involved in removing the "improvements."
I also have my own color preferences and I've never bought a house without immediately repainting, inside and out.
If the changes are quick and easy, make them. If they'll take a lot of money and effort, they might not be worth it.