No one should expect to keep the exact same tastes their entire life. Times change, people grow and get exposed to new ideas and cultures and sub-cultures. Change is actually pretty fun when you roll with it.
Take a look at the things you've had in front of you so long you've stopped seeing them. Do they still match who you are?
Is the artwork on your walls – when you look at it with fresh eyes – still what you want to see every day? How about that stuff on the front of your fridge and next to the phoone? And those knick-knacks there on the shelf?
If it isn't you anymore, send it on to a new home.
If you aren't quite sure you're ready for that, set it aside for a while. (More about that tomorrow).