Personality is all well and good when you are living there. Fill your boots.
But when you are selling a property, you have to recognise that the number of people who share your very individual decorating style, and who want to buy a 3 bed in Rhyl is very small indeed. If you do not share the previous owner's taste, it's a lot to put right. Not just walls, but ceilings, woodwork, kitchen... lots of time and money.