Yo, personally I like your JWD name. Mostly because of the history lool. But, I'm not stopping ya if you really want to change it back to jstxn. In fact, maybe test out jstxn with a Christmas name soon? ( ͡° ͜ʖ ͡°)
Everyone likes abbreviations, I'd stick with JWD for in-game and forums unless you're talking to close friends or people you really know, then if they choose to call you by your real name then that's that.