I practice intermittent fasting, meaning I only eat during one window in each day. I do an 8-16 split, where my first meal is around noon and my last food is around 8pm.
I've done one 3-day water fast so far and would like to do it again, it was great.
I need to collect more concrete resources on fasting, most of my information is second hand from people like Tim Ferris and Peter Attia. Broadly though I have enjoyed the following benefits:
More regular energy throughout the day
Better understanding of the relationship between certain foods and mood
Increased lean mass with minimal body fat
Even gaining lean mass without increasing body fat noticeably