Maybe you never thought of yourself as a hobbyist. Maybe you just never had the time for anything other that work, raising children, cooking, housekeeping, and all the other things you've done in the last few decades. Now that you are retired and the kids have launched (maybe that is your retirement!) you have some time for yourself. Whether you are active, creative, or social by nature, here's 20 fun hobbies that can enrich your newfound freedom. Retirement doesn't have to be boring, unless you want it to be.