I know it sound cheesy but when a person is writing, you can really see there true nature. there heart on there sleeve if you will. It's impossible to not write and not let yourself get involved with the fantasy of it. it's mostly why I write in First person, form. I like being able to portray myself as who I see the main character of my story that I am writing as. It's kind of fun to do it that way. But i want to know why do you write?
As a writer I'm a slave to my Muse. Unless I'm in JUST the right mood, and Abby's willing, I can't get anything done. I'll sit and stare at a blank page for hours... but for me, the craft is more important than the story, which is why I crave reaction to my works.
Feedback is solicited, collected, organized, and analyzed. Critiques examined, complaints taken under advisement. I LOVE hearing back about my stories, especially complaints. I mean, "good jobs" and "attaboys" are nice, but futile... to get BETTER, I have to know what's wrong with my writing: faults and flaws in my characterization, my style, my mechanics. These are the files I hone my fangs with, attacking my stories again, gnawing at their bones till the fresh, bloody marrow shows, nourishing my style for the next story. My ego is massive enough that someone shooting critiques at me is like flicking peas at a Buick LeSabre... there's no chance of dinging the armour. I'd rather have 10 people list 10 things they hate about my story than have a thousand people read it and forget about it....
Writing is a form of art, and the most profound things we say are based in our emotions in experiences. However, I think form and the intellect are very important too. What separates mediocre writing from good writing is a form and structure that enhances the goals one starts with when thinking about "writing from the heart."
A common mistake among developing poets is to embrace free verse because it seems easy and they feel forms somehow limit their expressiveness. While one need not use heroic couplets or anything, one has to make some sort of conscious structural choice when writing poetry. A poor structure can stifle expressiveness, no structure makes it no different from emotional ramblings, good structural choices enhance and facilitate the messages and emotions. Free verse isn't necessarily bad, but I think many of the free verse poems we see by amateurs are actually just a sort of a guesswork and instinctual type of structure, and that if they thought about it and banished the idea that structure is inherently limiting, they could make their poems more effective.
I think with prose, there are similar challenges. For me, many stories start with an idea or vision. I have to decide when to use flowery imagery, when to advance the plot, when to write emotionally, when to write detached, all in subservience to the vision.
So, I think writing is from the heart, but it is the idea of taking that which comes from the heart and building it into something powerful and meaningful, using the technical tools of writing to enhance the heartfelt vision.