I like to compare OSses to playgrounds

OS x: a grass field with a fence with a watcher that keeps you from doing something possibly dangerous(/fun) . It's safe but not a lot you can do

Windows: a grass field with a fence, you can climb the fence if you want and do dangerous things if you aren't carefull. less safe but you can do more

Linux: a terrain of your choosing, you can do whatever you want, but it can quickly become dangerous if you don't know what your doing.