For me, the joy of programming is in solving (algorithmic) problems, not the design of 'enterprise applications'. During my day job the architecture is way more important than cranking out the best performing algorithm all the time. And I enjoy the architecture part to a large extend luckily, but it has burned me out in the past.

So for me, what got me passionate about it again was picking up a new language and doing things like projecteuler or leetcode etc. Just trying to solve algorithmic problems with a new language, playing around, learning, improving the code.

Every now and then I need to repeat this cycle. :)