What kind of results can I expect from rhinoplasty?

My two biggest concerns are my profile (which projects too much and possibly has bit of a dorsal hump) and my bridge (which is very flat/square and bony). Additionally, I'm wondering if perhaps my tip is a little too wide for my features. It's hard for me to be objective about my nose to determine what it is that makes it appear 'a little off' or less aesthetically pleasing than it could be. Any professional input would be greatly appreciated.