I enjoy my class better when it isn’t the best. I might even enjoy it the most if they’re the worst. It usually means that I’ll be challenged a bit more, and I crave challenge of the sort where I just have to play tighter to survive. The way balance works in this game, it’s unlikely that any (perceived) balance issues will actually hurt my chances at progress.
I like being sort of uncommon. This is true in for many of my choices, too, including talents and cosmetics. I regularly change my demon horns if I see too many people with the same ones. There are so many vengeance demon hunters strolling around Dalaran, Lazier is but one among many nearly-identical demon-elves. But on my brewmaster, I’m special. There’s not so many of us, and I like that.
Flavor-of-the-month population surges aren’t my thing, either. I like my little group of people that enjoy the class for what it is, not the ones who felt required by their raid to reroll to it.
Most of the time I don’t even realize there was an imbalance, and I still did just fine! I tend to not pay attention to population or rankings at all until I get multiple questions about it. I’ll never be one to reroll for balance reasons.