Most guys who I know who have serious size...I'm talking big enough to go pro in a few years, never come off the sauce. Some of them cruise for like 2 months at 500mg/test every week, but, for the most part , from what I've seen, they're always on something.
For me when not on cycle to maintain my size I eat and eat and eat some more and also use Creatine...I like the stuff it seems to work for me.