Well unless you count a single published poem as being a "professional" I'm not.

Of course, I often remind people, that was a legitimate publish and I was paid. I didn't have to pay any money to see it in print; the publisher paid ME. LOL
If you're interested in experimenting, I really recommend trying the perspective of an observer. When it's loaded, Foster Forest part 16 is an example of it. That was my great experiment and it turned out beautifully, I think. The observing character is also highly sympathetic, which helps, I think.
For me, my big
love in fiction (of any kind) is strong characters. I usually try to keep a running character bio about the characters that I use and reuse. Since everything I do is in serials (which are essentially short novels -- the Foster Forest Series 1 is 80,000 words long), this is not only important, but it's less of an inconvenience than if I was building a complete character bio for a single short story. I do this for all of my characters, including those who are fairly minor to my plots. I like to know what their motivations are.
I've said frequently that when I create characters and when I role play, I do it as an actress rather than as a writer. One thing that I learned early on in my acting life is that you're always looking for your character's
motivation. I try to always know what is driving my characters when I write them.
When my Nery Legacy is loaded, a lot of people are going to hate one of the characters. They're supposed to. But I know what this character's motivations are for outright cruelty. And that information will come to light when I think that it's appropriate for it to do so.
So I suppose that would be a piece of advice that I would offer: always know why your characters are doing what they're doing. If Marilyn is ticketed for speeding so that Karen can give her a sound, bare bottom thrashing, what caused Marilyn to break the speed limit in the first place? Was she late for work? Was it her anniversary with Karen and she wanted to get home before Karen got there to do something nice for her? Is she a compulsive speeder? Testing the power of her new car?
In my opinion, the most important question for the writer (or actor!) is "why."
ETA: I'll check the stories tomorrow. I've got some time since I insisted on finishing school today. Hopefully next week I'll be done on Friday. But I get one day off!
ETA again: I missed a bunch of posts! Sorry!
I personally think that shorter stories that remain in a single headspace are
more effective than hopping heads, but I think it depends on how you define "short." I define "short" as being less than 500 words. Anything over that and I think we're reaching different territory altogether. I'm essentially writing slightly disjointed novels here. Definitely with the Nery's. There's a lot of continuity there!