While these are guidelines for flattering haircuts, they are really just that guidelines. The secret to looking gorgeous is really in one's attitude. The last thing you want to do is get a haircut that makes you feel unlike yourself.
How you feel about yourself always trumps what the beauty industry (that includes me) feels is flattering. Never let anyone shame you into thinking you won't look great in (insert hairstyle here) because your face is (insert face shape here). Because if you have the right attitude, you can carry.