For me,it is something I can plan, purchase, prepare for, process the wort, control the fermentation, package, condition, consume and share, enter in competitions, and get great satisfaction from.
Add to the above, I have made great friends, done cool things, become a BJCP judge, and waste time on forums. Beercations are also a part of the lifestyle. Heading to Germany again, because the wife and I can, and love it there.