I'm a writer too. Or at least I write for fun.
Usually, when I get an idea, I like to play around with it in my head before I write anything down. I like to work things out ahead of time (get the basic plot down, and think of things that would be important for the story). Then, I usually free write for a few minutes (this is usually a process of days. I am by no means a quick writer). Sometimes it's about the story, sometimes it isn't. It's fun, it gets me writing, and it gets my brain moving. Then I just start writing. I usually write everything out before I type it up. I like to "see" my story (of course if I'm writing a paper for class, then I go from thinking about it to typing it up the night before it's due. And I use my best friend, BS

).
It's been AGES since I have written a story using original characters (of course I don't have a whole lot of time to write, and when I do, it's various types of fan fiction). If I were to write a story using original characters, I'd like to get a whole history going. Think of their past, hopes, dreams, that kind of thing. Make them real. If there's one thing that I *really* don't like about some stories is how some characters aren't "real" (I can't picture them). I see this in some TV shows. The characters just don't seem "real", and I want to throw things at my tv.
And I don't like writing poetry. It's waaaaaaaaaaaaay too structured for my tastes (you heard me. Poetry. Structured).
Of course I'm no writing expert ("Spelling and Grammer Mistake" is my middle name), and I could care less about sentence structure or methods of writing (I took a creative writing class my junior year of high school). I just like being a creative individual...