I've been a customer service manager the past 10+ years and I got burnt the **** out. I couldn't do it any longer so I made a career change. I'm an account executive for a company booking kid school assemblies that motivate them to embrace learning, never give up, etc. I took a temporary pay-cut until my commissions start to kick in but I love what I do. No more having to manage/babysit a bunch of a-hole adults that don't want to work. I get to talk to schools all day long about making their kids better and I just have to worry about my own workload.
Life's too short to be miserable at a job that will replace you without hesitation. Took me long enough to get the balls to make the change but better late than never?