Why I still hunt POTA stations

Why do I still hunt POTA stations?  After all, nine out of ten calls/parks I hear have been worked multiple times.  There are four reasons as follows:

1. Test and find tune my Morse keys.  Especially bug keys.
2. Use of my lower power radios (HW-8, TR-25 and NorCal 40B).
3. To not only see hits on the Reverse Beacon but contact someone.
4. Work the occasional new park.