+1 on most of the above!
I must admit, it's only the last 18 months or so I decided to become a bit more, shall we say, single minded in my approach.
Since then, if it doesn't work for me, and is beyond sensible resolution, then you're better off out. I'd rather play on my own in a dark room than put up with some of the rubbish I used to!
So far, it works fine. If nothing else, it sends out a signal that you take things seriously and won't be mucked around. Hopefully find like minded people.
I've actually ended up in two bands because of it. Should have changed my attitude years ago!!