What other hobby...

Walking under the sky, and reading a book, listening music, i dont need hobbys, except communicating with mimosa plants...

And dont laugh, it was already proven in 1925 by Jagadis Chandra Bose that plants react and think...He was voted in the 7 most important people in Bengal history and i read his book when i was 25 years old, 45 years ago...


It is NOT the same Bose that in physics is the creator with Einstein, of boson condensate and statistic concept, Satyendra Nath Bose ....2 genius in physics tough, but my Bose is also a genius in physiology....

:)

Porn ... ;-)

Without love boring like audio on headphones....

Is that a hobby or a sport? maybe both..  ;-)

I forgot about playing with the cameras, Love my old Minolta and newer Sonys. Just love fiddling with them..

Regards

Infinite? That's a pretty big concept. What hobbies have "infinite" variables? None, and imo not even close. I believe we are on the very, very low side of "infinite" variables (unless one wishes to play fantasy games intellectually). Of course, I do believe the OP was using the term loosely, not technically.  

When you begin to gain appreciation of the vast spectrum of performance, even when aggressively experiencing a wide variety of systems, it's a humbling experience. You realize that though the variables are not infinite, they may as well be when it comes to the various outcomes in systems and their performance. I build dozens of systems a year, and the spectrum of performance does not narrow, it widens. 

But, and this is critical to me, the enjoyment of variety is endlessly fascinating and rewarding. I spent an hour last night discussing with a manufacturer one Dip Switch inside a DAC that alters the entire performance of the DAC in several ways. It's another whole "infinite" field of variables inside the machines, as our DIY and manufacturer sector knows!  

Ceramics is pretty close to infinite. Humans have been making pottery for 50,000+ years and have barely scratched the surface. We have only begun to understand what happens inside the kiln in the past decades. The atmospherics are mind bending. And that is but one small arena within ceramics. Glazes, clay-body glaze interface, clay bodies, forming and shaping. On an on.