I've been using gear on/off for over 6 years and still do well on low doses. My current cycle is 1 amp organon sust per week and i'm doing good... If you have a good foundation, train hard and smart, eat well and rest, then lower doses are enough. Of course genetics play a huge role in all of this too. But the truth is many guys take mega doses to compensate for the fact that they are LAZY. And believe that anyone who's bigger than them is simply on more gear, because it would "hurt their feelings" if they had to realise that aren't cut out for this game.
PS. I have to admit that if doses like 1 amp or 20 mg of dianabol etc. didn't make me happy i'd use more...