@boomerang,
We bought a baby boa constrictor for our oldest son when he was about 11. Prior to that pet he had an iguana (about 6" long). He and Noah the Boah were fine, all his friends would come over to watch it have lunch. He (and his friends) handled it a lot for awhile, but when school started he stopped handling it. I became afraid of Noah but can't say why, I guess his just laying there all day long. Walking upstairs one day I saw this snake throw himself against his acquarium when he saw me walking up the stairs. So, terrified of Noah was I from then on. We took Noah back to the pet store because we didn't know what else to do.
I just had the feeling that these things should be living where snakes live, outside being a snake in wherever place boas live. But, I liked the snake. It just wasn't for us. The thing was, our son never missed him.
Not to descourage you, some people love their pet snakes.