Your contribution to this forum is perhaps the most valuable of all. You have provided exceptional scientific advice to all medical issues reported here and furthermore you have promoted and established the most important value of Powerball: the rehabilitation benefits.
If you wish to take a break, it is fully understandable. (And I couldn't ever argue a bit to the reasons you are mentioning). Be assured though that even if some people neglect to provide a feedback, these and many others benefit from your consultancy and seek the opportunity to expand their knowledge (even those who don't have direct personal interest in each medical case).
If you feel like coming back in the future please do so; your specialized knowledge and experience will always be most welcome here.
Take care and with my best regards