That's a great question! I think the best way to develop characters is first to give them a fatal flaw, something they have to overcome within themselves to achieve their overall goal. The true reality is nobody goes from point A to point B easily, so the protagonist has to face many challenges that test their fatal flaw. Of course, most of the time, the protagonist will fail, but by the end of Act 2, they realize what they must do to achieve their goal.

As a writer, I think it's a great way to get the foot in the door and it's an enjoyable process! Sure the payment might not be millions of dollars at first, but over time, lets say you wanted to direct and produce the script you wrote, then the pay could increase.

Personally, I've never wrote a novel, but I'm sure writing a novel and screenwriting can be challenging, depending on how you look at it. In both mediums, structure is important. So I guess to keep things simple, screenwriting is easier than writing a novel.