'ello. :)
If you are going for multiple and diverse story paths, I would suggest taking after Endmaster with the way he makes story games; minimum of about 4 pages in a path, and maximum of 21(I think?) in another. (he isn't actively writing, but he has many featured games)
If you are hoping to accomplish a very long storygame, then I would suggest taking after Kiel with the way he makes story games; limiting the number of options in exchange for very long story paths so it doesn't end up increasing exponentially, and using scripting and such to make less work for himself while more play time for the player. (he currently has a game that has 750+ pages that he's still working on.)
If you're hoping to make a story that has a very large game element, then I'd suggest asking Nmelssx, BradinDvorak, or BerkaZerka for help. (The links lead to examples of their work.)
If you're worried about a passage you've written, you can always make a new thread in the Writing Workshop and copy/paste said passage into it to ask for opinions. There are several members who would gladly give helpful advice.
For future help with scripting/coding, you can always ask in the Advanced Editor forum.
As for your question; it depends. How are you planning on making the personality developments? Do you mean that there are different paths for the personality developments, or are you planning on using scripting to change statements on the page to reflect personality changes? It is possible either way, it just is a different way of doing it for either choice.
Edit; Sorry for the long wait. I started the post about 2-ish minutes after you posted, but I had a cat demanding my attention and I'm not that fast at typing in the first place. >_<'