I think you can aspire to be what you want to be in life. But realize, too, that life also has a way of bringing reality right back at ya.
So aspire to be a small, skinny, boy model. But if you have a large frame, or are seriously overweight, or have very feminine characteristics, realize that even a good diet, working out, and T may not give you the body you desire.
As someone else on here said, he'd hoped that T would make him tall, outgoing, and hung like a stallion. Instead he's still short, shy, and hung like a housecat. (which describes me also!).
Jay