I think for most things it doesn't matter. Knitting the top of a hat where you decrease might be a problem so you'd have to flip it right side out. I'm not sure if there will be line where it got flipped so it shows or not. I'm also not sure if any stitches will be affected or not. Probably not in most cases.
Personally I'd learn to knit "correctly", for lack of a better term, because patterns are written assuming you're knitting that way, but if you're happy with it go for it.