I suppose the secret factor of voice is not how deep it is. Intonation counts..! Men talk in a way somewhat monotone, women often use variations of pitch more time than men.
Someone with super-deep voice and thick vocal chords can be extra-feminine because of consciousness. And there are high pitched voice guys talking in a manner so masculine.
The 'Boom You Voice!' video is very helpful, anyway. Go for it on YouTube.
Also if you can afford - buy a mic and record your voice all the time, then listen to those recordings. Try a single sentence many times! Pay attention on how you talked in each situation, what you did, how you spoke... Learn the difference.
Be careful, you could ruin your voice easily if you choose to train yourself on your own. So at least once, visit a voice therapist or find someone who is studying acting or is an amateur/pro actor/actress etc. If you ask a voice (singing) teacher you may learn new techniques, how to breathe and not cause pain in your throat.

(Sorry for my English, haven't used it for a while. :/ )