I believe people greatly underestimate their true natural limits! Some go on juice before they really reach it.
It takes years to really discover one's true natural limit, maybe 20 years or more... Not 5 years like some may be claiming!
One of the best natural bodybuilders that I've ever know is Sean Sullivan a guy who used to help me prep for shows... Sean's been competing since 1981, and one of his BEST ever showing was in 2006, he still finds he makes great improvements today both in the gym and in the way he looks!
This is a sport of consistency and lots ad lots of patience!
For those who are posting up pictures, you all look great, and even though I don't know much about you I think you are all cutting yourself short if you are claiming thats your natural limit!