My friends and I all bought within about a year or so, and my house was awarded the "most beautiful" title (in a conversation where we also gave out best location, biggest etc, so not some wanky one sided thing).
We happen to be lucky that the previous owners did a wonderful finish, and the house was barely more expensive than places that hadn't been done to the same standard.
We actually have laminate throughout, but everyone immediately says, "ooh, real wood floors" (before I somewhat smugly correct them). There is cheaper laminate in the conservatory, whish pisses me off because it doesn't match the rest of the house.
We seem to have ticked a lot of the boxes here - white walls, neutral grey furniture,pops of yellow and green in different rooms. (The ones that are finished anyway). Copper and grey in the bedroom. Bits and bobs of personal and professional artworks, nick nacks from travels but not an excessive amount.
I think the point about mixing textures is massively important when it comes to style. I picked it up from a interiors piece that pointed out minimalist colour schemes could look so much more engaging if there was a mix of shape and texture within it, and now I've started paying attention, it is what makes nice looking arrangements really look beautiful.