Yikes, what do you mean? How long or daunting the task is?
Or you get to a place where it's like. The jump between Medium and Hard in Rock Band. Where you need more than just brute force to get through. You need to WANT to do it.
Also, yes- Write and rewrite. I regualrly spend 30 hours working on something and then 2 hours reprogramming it
I know exactly what you mean now. I'll be wary of this. I don't play on starting anything epic even after I have programming dialed down, but if it's something I really enjoy, I'll inevitably try and create something grand, and I'm going to hit with with a lot of determination.
It's hard for me to anticipate something like this, however, because I've never really completed anything creative. I sketch and draw all the time, but I wouldn't consider those drawings complete. I've written short stories before but I've never written an entire book.
So, it's somewhat terrifying that you mention something like this, but I'm also very thankful. Now that I'm aware of an instance where I'll hit a barrier, I at least hope it'll be easier to tackle.