As a recent home buyer, I have some tips.
While we were looking, I watched HGTV all day. It seemed like if a room had color, they gave the neutral spiel. But if the house was neutral, then they said, you needed a little color, and they would paint the room green, blue, a dark chocolate, etc. I think they make things up as they go along.

But, honestly, I am not a neutral person. The living room, master and hallway in our house are painted a nice neutral color, and all it is, is a sign to me that I have to repaint. I hate it.
There is some truth to the painting though. My scrap room, was a girl's bedroom and it was painted lavender. It took a coat of tinted primer, and 2 coats to cover, and I still think, depending on angle I can see the lavender. If you have colors that are hard to cover, screams from an era that is not now, or really are going to be limited to who likes them (lime, orange, etc). Then repaint.
More important to me was 1. Cleanliness. Cleanliness should be obvious, but apparently it's not. Even houses that didn't have clutter, had a thick layer of gunk along baseboards, the grime that builds up around doors and light switches from repetitive use. Nothing turned me off more, than a house that didn't even look "company ready." Then I wondered what evils were lurking. And the houses where it was obvious that the animals were allowed to use the basement as a potty. Have a friend come over and check for smells, that you get used to from living there. Magic erasers are your friends. When I helped my Dad get his house ready, we washed down everything, and I was surprised how much better the walls looked just from a good cleaning.
2. Lighting. Part of this does refer back to the paint issue, if the paint makes the room look darker, repaint. Make sure your windows are uncovered when you leave. The staging shows usually remove blinds and heavy curtains, but you still have to live there, so at least make sure they are pulled back for showings. Really dark spaces, like finished basements, or large rooms with only one bulb as a light, may need additional lighting. That could cost some money, but if you need it and can install them yourself, I'd do it.
3. Anything from your parents era...get rid of. Carpet, wallpaper, light fixtures from the 70's, bathroom fixtures if you can.
4. Make your small spaces as functional as you can. Usually, there is just too much stuff squeezed in making look small. But you don't want to take too much stuff out so then people wonder what sized bed or dresser would fit in this small bedroom? Make sure your furniture is the proper scale for the room. A lot of furniture that is sold, seems to big for most normal spaces. If you have a love seat and a couch in your living room, and have storage, remove one of them.