On Mon, 17 Feb 2014 09:57:24 -0800 (PST), True North wrote:

You could write a book on Johnny's obsessions.
They change by the hour and the day. In the good old days they might have called that behaviour 'flakey'.

To whom are you responding?

Actually, it's not good to have all your attention devoted to one thing. That's called a 'fixation'.
You're much better being well rounded. I guess, up there, you folks call it 'flaky'.