here's my opinion. when i started juicing when i weighed around 162lbs i was worried about being fat. i had a bf% around 7%. Now im 210 and my bf is 10-11%. it is really hard to be big and lean at the same time. you need to sit down and decide what you want to do. when you start droppin the weight your just gonna want to bulk again. im 5'9 and im not gonna cut until i get to 220lbs. if i were you i would do another bulking cycle and eat everything. then your next cycle do a cutting one. i think you will be much happier with the overall results.5'11 166lbs isnt very big. you should go to around 190 then diet down. its an up and down battle with steroids. it takes a few years to figure out what works best and how to diet. it took me 5 years to get my diet right.