Last night, I printed out 75 pages of the unfinished novel I'm working on. I re-read over it once, noticing all what was wrong with and enjoying the parts that were good. Now, I'm reading it over again, this time with a pen in hand.
It can be incredibly depressing, some of the things I've written that I know aren't good. And then there are the few good parts in there that remind me why I write anyway. There is always something good.
I've been told I have talent. Talent without discipline is very bad. I lack a considerable amount of discipline. I tend to write what I wish, with an attempted plot or angles, and however it comes out, it comes out.
Also, when I do try to plan, I never follow it. That's lack of discipline at its worst.
Writing isn't something to be entered into lightly. But it is something that there are plenty of different approaches.