It depends on your branch and career field.  There will be fats, most of them will be exceptionally worthless (whiny, constantly injured).  At least you can openly hate them (especially once you outrank them) and not invite them to anything you do.  You won't need luck for boot camp; hopefully they won't hold your hand as much as the "branch" Times seems to make it seem and you'll have some hilarious stories about having to clean up your bay after the TI literally throws everything you have all over the place because of the one guy who fucks up the entire time he's there.