Nah, I was the youngest of 4 and ran wild (literally) on my pony, then my horse and my mom was definitely not the mother hen type. I had no fear on the pony or horses back then. I do think it's genetic as my daughter is exactly the same way. But it doesn't stop us, just holds us back a little I suppose. Could be worse. We could both be couch potatoes! I'm incredibly cautious but still have a blast, and I AM improving. Is it possible to be a chicken S*it but still be an adrenaline addict? At the very least, I get high off the endorphins from exercise and the outdoors.
tanscrazydaisy does what I do on lifts--bar down, don't look down, and BREATH! It helps to strike up a conversation if I'm riding alone with strangers. I had a moment last year at Mammoth (which is notoriously windy) on a lift that they closed down shortly after, where we came over the crest and just got lambasted (slow lift) and were rocking side-to-side. I grabbed the back of the chair and cursed many choice words. Got off and was fine.