[member="Terry Devron"]
Here's something that might help.
Stop thinking of characters as gimmicks -- as their one unique thing, as their toys, as their skillsets, as their shiny hair. Stop thinking of them as One Thing -- because just about any real character is three or four or five things all at the same time, and you can flit between those roles and priorities as you see fit. Stop thinking of characters at all. Create a character that's natural for you, with an agenda that's natural for you, then go out and throw him into public threads and just...react. Act and react, over and over again.
And then, the next time you want to make a new character, DON"T. Don't indulge yourself so far that you lose self-discipline and never finish anything. That feeling of wanting to move on, find something new and shiny and fun rather than buckling down and putting in effort? Don't privilege it so much that it keeps you from ever doing anything. That feeling is natural, it's normal, but the choice to listen to it is yours and always has been. And the choice to deny it more often than you give in is what makes you a grownup.