It's always a good idea to keep your home updated, but when can it be too much?  If you are putting finishes in your home that are above & beyond what is typical in your neighborhood, it's likely that you won't get a great return on your investment.   Keep in mind that your neighboring homes are your comparables and will be used as a basis for determining the value of your home.  If you are updating for your own personal pleasure or taste, go for it!  If you are performing those updates just to make your home more valuable to sell, your "imported Italian marble" may be too much for your "ceramic tile" neighborhood to bear...