I think that in life, you have to learn to adapt... you need to walk a different path to get to a different destination. If the same old style in the same old school with the same old people is not doing it for you, then, why not leave? Sure earning a black belt shows dedication, but there is a difference between dedication and stubborness.
For me, I have left karate and ving tsun for the street practical, harder workout, ground and pound brazilian ju jitsu. I couldn't be happier.
The only kind of "floaters" that irritate me are the ones who quit a style because they don't get there black belt fast enough, or because they are simply are not progressing fast enough.
You need to either train harder or be super patient. Still, people have lives and other obligations, so it is unfair for me to think poorly of them because they quit.
Anyway, If somebody has floated to many schools, then you can consider them a true master, because they are "like water."
water can flow...