I read about or watched a video of someone who knits inside out and I am inclined to think that if I hadn't paid attention and got in the habit of doing it the other way, I would too. Mostly, I guess, it's just habit. Probably most of the time it wouldn't matter anyhow. Whichever way you knit, inside out or outside out, enjoy. That's what it's all about.
Happiness is catching that dropped stitch while it's still fixable..