Spending all my spare time reading vs playing with the other kids.
Knowing all the names of the constilations visible in the night sky at the age of 6.
Doing my older brother's math home work in my head, for fun.
Spending hours trying to get my hand to do the Vulcan sign which wouldn't work. So I glued my pinky and ring fingers together with super glue. Mom wasn't happy with me, to say the least.
Searching for any rerun of TOS in the TV Guide and staying up to watch them, over and over