There is no substitute for experience. You learn things on your own that no one can show you. You will have some sticky situations come up in "real world" flying that can't be shown to you at a pilot factory. 500 hrs is better than 300, 1000 is better than 500 and 2000 is better than a 1000. The point is that you learn everytime you fly. When you have a thousand hours, you will probably look back at how rough your skills were at 300. Teaching, cargo, part 91 corporate, charter; all of these will offer diverse experience that is impossible to recreate in the training environment. Its also fun to fly this type of stuff. I flew a 310 and a malibu for a local doctor while I was in college and he had vacation houses in mexico, belize and roatan, honduras. Flying to those places was a blast as well excellent experience (non-radar, bad weather, no nexrad, only metars and tafs, and poor comms). The quick finish flight school environment is too restrictive to allow you to gain the valueable experience making tough decisions that are necessary to safely operate an aircraft in an all weather environment as the pilot in command.