a fork in the road

I've been told I put my emotions into my work. He mentioned that as a negative and I haven't put much thought into it until now.
At this job maybe I cared more than I should have and could have kept my mouth closed more.
Pouring one's heart into what he or she does, injecting emotion and lighting it on fire with passion; is that a bad thing?
on one hand for a fact it tires out the soul, but the payout knowing you put your heart into it is huge. on the other hand the greatest business people have been stone cold emotionless shells. someone once told me "to be a good businessman you can't be honest". which in my case doesn't work. In the end, do I want to chase the riches & the fame, or would I rather be proud and honest. or perhaps could they meet halfway? (not gonna happen) I'm writing this because I've noticed that I'm slowing freezing over (literally and metaphorically) and it's changing me, I'm not sure if I want to head down that path and lose something I won't be able to get back.