Hi Haley! Would love to chime in. Are you doing a flip and trying to keep costs as low as possible? If so, neutral, updated and home depot/amazon is definitely the right way to go. One thing to consider is also looking at other homes on zillow around your address, if you see that everyone is doing homes the same way then yes, you should consider what color, tile, and updates can really make yours standout.
Flooring: I personally love home depot's LVP in Easy Oak. It's a really beautiful warm color that is neutral, durable, and cheap.
Wall color: Snowbound works but just know that it tends to be slightly colder. I have loved greek villa and alabaster from SW as they are slightly warmer esp with sun. I agree that doing the walls, trim and ceilings the same color is a great option. If you are flipping to sell, it may be best to present the house with an open airy feel that is ripe with potential.
Kitchen finishes: Our primary home was a flip with white cabinets and black finishes. We loved it when we bought the house and what mattered to us most at the time was the layout of the kitchen, not the color of the cabinets. If they were a better material, I probably would have loved the house even more but if they were a color I didn't like it would have been a harder sell for me. Now that I'm a more experienced designer in real estate, I would love to customize my kitchen more with different materials, unique tile, and more unique pulls/knobs but having a large, clean kitchen was extremely appealing to me as a first-time buyer 4 years ago. I've also renovated another kitchen to just have white cabinets and black finishes to keep things as cheap as possible. Photos were great, and we got a renter quickly at a higher rent. At the end of the day your cabinet colors will not necessarily add $ to your purchase price since color is so subjective. I'm a fan of the more neutral color choices so that you can stage your home in such a way that there are more options and opportunity to create more pop for your photos. White subway tile + white paint + white cabinets + black finishes = a great formula to keep cost low while achieving a modern look that will appeal to buyers.
Happy to connect and hope this helps!