When I first started playing I threw exclusively forehand. I continued that for many many years and just recently started developing my backhand throw.
I still can't get the same distance with a backhand that I can forehanded, but I'm finding that the backhand gives me much more control.
The fundamental difference in flight of the two throws is that a backhand will spin much more than a forehand. The added spin opens up a variety of shots that are just not available to a forehander.
For instance, throw an understable disc forehand and you're likely to flip it end up with an out of control roller. However, with the backhand, that same disc might take a nice slow left to right turn.
When you're first starting out, I think it's important to focus on one style to master. Once you're comfortable with that, work from the other side. Having both shots available in your arsenal will give you a huge leg up on most other players.