Wow, cool thread. It has made me think about how different (and more annoying) writing is for me from any other creative hobby...
I am not a skilled visual artist. I know the basics of how to use some types of paints, plain sewing and woodworking, some embroidery... The only thing I have actual training in is flameworking/glassblowing. But unless I am making something utilitarian, like a shelf (in which case I just... make it?) most of the time I look at these crafty activities as play. I will just sit down, maybe with some vague idea, and do whatever feels right. Somehow, I am mostly motivated by colour. I love the interplay of colours. I care about the end product much less than about the process, because the process tends to be a joyous flow experience for me. (This is the only way to do glassblowing, btw, because of how often your best pieces break just as you're finishing them...)
But writing is my blessing and my curse. It's very much about the end product; I am a selfish writer, in that what usually motivates me is my wish that a specific story exist so I can read it. (I do reread about 90% of my own stuff from time to time, and most of it does scratch the itch I had when I wrote it quite well.) I have done a few fic exchanges, and the ones where I really couldn't get on with the prompt were very hard for me.
The writing process is, ugh, let's say emotionally fraught in a way I really, really dislike. It goes through endless loops of:
1. Have idea, think it is amazingly awesome, jot down the basics while feeling pleased with self.
2. Come back to edit what I wrote during my flash of inspiration. Get depressed at how poorly my prose flows.
3. While editing, realize that my inspired ideas were actually very stupid. Some of the worst I ever had. And that, if I share this piece with anyone who liked my older works, they will finally realize that I have a stupid brain.
4. Have an identity crisis.
5. ...slowly think of a way to maybe fix the awfulness. Wait, that's actually brilliant! Let's go back to 1.
I go through this loop many, many times until I am happy with a piece. Although I think 'resigned' is a better word than 'happy' here. At the point where I stop I am usually like, "okay this seems to do the job but I am so familiar with it that the words no longer make any sense". So I set things aside to get cold before I do more editing.
Oh, also, generally speaking, I am a plotter/planner, and tend to have a pretty clear idea of the general shape of a story before I even start. (This includes checking in with all the characters to make sure they are OK with what I am planning to make them do,) By the end, I like for stories to have a sense of... I don't know how to describe it, connection and balance? So different elements I might use (themes, locations, phrases) reoccur in various ways, and that there isn't e.g. some random POV somewhere that I only use once and never again? Also, I need for all plot threads to be tied off neatly. (I have no idea whether any of this is actually making the story better for readers. It just bugs me, like an itchy seam.)
Last month I did an experiment of trying to write a multi-chapter fic with no planning, and it started off great (so freeing, almost a flow experience) but by the end the 'agony' aspects of writing hit me very hard. I still find the story pretty unbalanced, and have many regrets. So I think it's back to planning for me!