It's incredible how much difference it makes, just the icon I have and the people in my division. Even when I was rank 1 diamond, I didn't play too much because it was exhausting. Some days I only played 1 game of 1v1, because I didn't have the motivation to play more. Even when I won, sometimes I would feel burned out and unable to play any more, and sometimes if I lost a bad game I would tilt like crazy and go troll people in league of legends.
The point is, making masters league changed everything. I can play for hours and hours without feeling burned out, and I barely tilt at all, even if I lose games that I feel like I should have won. Playing 1v1 is more rewarding than ever, and it just generally feels good to play, whether I win or lose. I've always loved starcraft, but making masters has only made everything more awesome.
So what I'm trying to say is, to me, masters league is so more than just bragging rights.