The true bodybuilding physique as we know it - proportion, size, shape, etc. - is 90% genetics. You either have it or you don't. Aside from the muscles, the level at which you gain and lose fat, how your body reacts to physical activity, how your body reacts to carbs, proteins, vitamins and nutrients, are all set when you were still a fetus. Very little can change it and even the best gear (drugs) with the best doctor showing you how to use it will not yield much gain. And yes, even how your body reacts to (any) drugs have been programmed before birth.
I'm not talking about becoming these 240lbs+ guys in professional bodybuilding. I'm talking about just possessing the traits that would be deemed as "bodybuilding type". And that, sadly and unfortunately, is a rare thing. Think about how many people have gym memberships and go to the gym at least 3-5 times a week, been doing it for years. Now, think about all of the people you see every week, every day at the mall, at theme parks, at work, Hmong soccer tournaments... how many of these people look remotely bodybuilder? Believe me when I say it's mostly genetics.
Now, if you're just talking about looking great (however subjective that may be), that's easily attainable for anyone. To look good in a t-shirt and shorts, hey, keep working out and just watch what you eat. Anyone who works hard enough can walk around looking good. But to really have a bodybuilding physique as this post title suggests, that's a whole different thing.
I'm just sayin...