all different things suit all different people!
i personally mix all 3 plans....i would say i was more predominently a mix of green or ee and very rarely red...but i do mix and i chose daily what i feel like that day.
you need to work out what you like and what suits you.
as you get more replies here you will find those that do just one plan,those that mix a few,those that like me use them all....no set answer,what works for one may not work for another