Nothing for me, I just try to eat a healthy, balanced diet with veggies, fish, etc. in it. Although I do use protein powder sometimes to beef stuff up for fun, like smoothies:
http://catch42.pbworks.com/w/page/78032378/Protein Smoothies
And healthier versions of goodies:
http://proteinpow.com/
And Protein Fluff:
https://www.youtube.com/watch?v=oR3Z028prSU
http://proteinpow.com/2015/08/apple-cinnamon-protein-fluff.html
If anything, I'd recommend Soylent if you want to make sure you're getting sufficient nutrition: (you can buy individual packets off ebay if you want to try it, they come sealed)
https://www.soylent.com/product/powder/
My views on food & supplements are always changing...I used to think sugar was the devil, but right now I'm a big fan of IIFYM. If you want to spend the rest of your life eating brown rice & stuff, more power to you, but you can get pretty good results eating donuts too:
https://nicolecapurso.wordpress.com/2014/08/31/how-donuts-gave-me-abs-an-80kg-snatch/
I think it pretty much boils down to this: you can either eat clean to get results, or count your macros/calories to get results. Or eat whatever you want & exercise a truckload. Unfortunately there's no magic supplement bullet, it's just about how you choose to eat consistently. imo, our bodies are designed to run best off 'nature food', so the more natural stuff you can get like meat, butter, veggies, fruits, greens, nuts, seeds, etc. instead of boxed, processed, artificial, margarine, etc. type of stuff, the better. But, you can also just do flexible dieting using IIFYM & control what goes into your body so you get results that way too, while also enjoying treats every day so that you don't feel deprived. So there's a lot of ways to do it, but it all seems to involve either eating better, or tracking what you eat, or exercising more.