Most flips at any given price point look the same, because most people renovating them are working from the same list. Grey floors, white cabinets, subway tile, the same light fixture that was in the last four houses.
None of that is wrong. It is just invisible. A buyer walks through, nothing offends them, nothing sticks, and by the evening they cannot tell your house from the other three they saw.
The rule
Every house gets roughly two things a buyer would not expect at that price. Not two more square feet. Not a more expensive version of something they were already going to get. Two things they notice, and remember in the car.
It might be real tile in the laundry room where nobody bothers. Proper lighting in a hallway that would normally get one flush mount. A window where there was not one, so the kitchen is not dark at four in the afternoon. Doors that feel solid instead of hollow.
Why two and not five
Because five stops being surprising and starts being a price bracket the house is not in. Two is the number where a buyer thinks somebody cared about this house, without thinking they cannot afford it.
Why it works
Buying a house is not a spreadsheet decision, even for people who bring a spreadsheet. Somewhere in the second walkthrough it becomes a feeling, and the feeling is usually attached to one or two specific things they can point at.
Give them something to point at. That is the whole strategy.
It is also, for what it is worth, the principle behind the tools on this site. The calculators that show their sources and admit what they do not know are the two things people do not expect from a real estate website.