Depends on who is buying. Your realtor should be able to assist in what the "target audience" is for your listing & should offer suggestions that are in line with that.
People who expect "move-in-ready" homes want builder-beige walls, nothing at all that is unique or trendy, absolutely nothing that would require removal (boring carpets, 'normal tile,' standard fixtures, traditional hardware). Some people will choose not to offer on a home because a single room required painting.
Case in point - a realtor showing our old home told us that "You really need to do something with the basement decor" It was the playroom, the decor was painted childish with finding nemo. Sure it's only a coat of paint, but they wanted to pick on stuff, so they did.
People who expect "a deal" on a home will often overlook cosmetic problems, though not always.
People who have bought / sold a few homes (or trust the advice of someone who has) generally look for "good bones" in a house - solid construction, quality finishes, and recognize the cosmetic stuff is so easily changed that it's irrelevant to the sale. What is $1000 in paint and cabinet hardware when you are buying a $200,000 home?
Staging in general - remove more than half your "stuff" - clothes in closets, stuff on shelves, books, kitchen stuff. Everyone wants to see some things there, but we all have too much stuff and it looks overwhelming. Remove as many personal items as possible - kids drawings, photographs, etc - they want to imagine their own children's faces on the wall, not yours. Fresh fruit or flowers are great, but only if you change them out regularly - wilted flowers and softening fruit are an eyesore. Check for sufficient lighting. Remove some bedroom furniture (a dresser, for example) to give the appearance of more space.
If you are including appliances, expect them to be opened and inspected. For god's sake, take the laundry out of the washer & dryer if you are including those
, go through the fridge & make sure it smells fresh inside, run the oven clean cycle. Take out the trash before every showing.
For my own opinion, we bought a house that had a maroon/brick red room, and a blue room (we painted over), the carpets all will need to be ripped out & replaced, even though the previous owner replaced them - he used cheapo big box brand carpet that will wear through quickly. I wish he had not repaired some of the tile or any of the electrical - we had to rip that out & replace because it was done incorrectly.
Big turn-offs: Smells (smoke, perfume, animal, musty) Don't cover them up, clean out the space, bleach it, etc. Critical work on walls/structure, damage to the foundation. Bad drainage or obvious water damage in basement walls - that can get ugly and expensive to fix.