I've been trying one of the more popular Intermittent fasting protocols -Leangains for 20 days and counting. It was uncomfortable only for the first 3 days.

16-20hr (well-hydrated) fasts ended with a heavy lifting workout and BIG meal at 'breakfast' (6pm or later for me). FAQ: http://examine.com/leangains-faq/

I love it.

Increased alertness, focus, no more mid-day food comas. I'm a fat guy, so my body is probably fat-adapted after a couple weeks of IF.

And i work at my ghetto standing desk from 9 to 5 weekdays.

I can't imagine living any other way now. It's wonderful not to be a slave to food. I see food as just fuel now.

Note: I do take 10g of BCAAs before lifting heavy fasted. There is evidence that they prevent catabolism of muscle.