I think some serious mistakes can be made viewing the RHP and LHP as two opposing things. They aren't in opposition, but merely co-existing. Viewing them in such a fashion will cause one to not see the forest for the trees. I would more accurately say that you can get to the same destination either way -- both ultimately seek truth. It would be better to view them in that way that say Jungian or Freudian psychology are different, but both viable approaches to the subject.
If you get down into the dirty details you will find that both are using a lot of same methods, but maybe to different ends. The key difference lies solely in the personality of the aspirant -- the RHP traveler views humanity as inferior or imperfect and thus orients their practice to nullifying or muting these interfering traits to achieve spiritual perfection. Things are only good or bad to this person based on whether they encourage deviation from that goal. Thus they may view drugs, drinking, and other excessive behaviors in a poor light because they excite the personality and keep them from the ultimate destination. The primary idea being if one managed to blot out the human completely one could likely directly experience the divine truth.
The LHP traveler views their humanity as a tool given to them to perfect which will enable them to experience the ultimate truth if honed well. Instead of that personality, consciousness, and unconsciousness being seen merely as a distraction it is seen as something that needs to be unified into a well-oiled machine. Thus, our LHP person may get drunk for merely the sake of fulfilling understanding why they need to feel that way at the moment. They may place an offering on a pyre, or do ritual magick as our RHP (wo)man may do as it suits and appeases them. The goal here is to unite the spiritual, mental, emotional, and physical components and thus become as a god rather than blotting them out.
You may ask yourself which path you are on. Well, you are on no path without a goal. Most people these days are on neither despite how many forums they reside on. They may be doing techniques or whatever, but still don't understand why they are messing about. The core of the LHP involves a perfected human -- the spirit, conscious and un-conscious, and his physical body acting in union to become a godlike creature. Anything else, and again... you are simply messing about... Which is fine... if that is what you need to do. =)