A little background

I am a 34 year old father of two awesome little girls(10 and 3) and husband to a gorgeous wife and yet I still dont know what I want to be when I grow up. Dont get me wrong, I am educated(well I have an Associates Degree in Industrial Design) I can hold a job(7 years, until the last round of layoffs at my former company) and I am a responsible father(at least I think so...ask my wife?) and yet I still get nervous and feel like I should be carded every time I purchase alchohol. I am not saying I have Peter Pan syndrome and am irresponsible but I havent found that one thing I want to do until I die. I have found many.......?

I have always been a late bloomer, played with toys longer than most kids of my age. So maybe thats what it is, I will eventually narrow my focus as I age? In my opinion(and others) my biggest obstacle is I have too many interests and can find it hard to concentrate on any one of them. This seems to carry over to my hobbies and career, most recently I worked as a model-maker for a large electronics firm but I have dabbled in: Product Design, Sculpture, Illustration, 3D Illustration, Writing, Model-Making, 3D Modeling, Wood Carving, Furniture Design and Fabrication and others I cant think of right now. I like doing them all and when I am in the moment I sometimes feels, this is it, I have found what I want to do from now on. Then, inevitably, I lose interest and move on to something else. At what point do you hone in on the thing that you will master.....or do you?