Many people who are extremely tall in their childhood find out that they have some kind of brain diseases that cause them to grow that fast, like brain cancer. So being TOO tall definitely isn't a good thing. Their joints also suffer too.

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"Look me in the eye. It's ok if you're scared. So am I. But we're scared for different reasons. I'm scared of what I won't become, and you're scared of what I could become. Look at me. I won't let myself end where I started. I won't let myself finish where I began. Look me in the eyes. I have something more important more courage. I have patience. I will become what I know I am."
-- Michael Jordan