I truly enjoy helping develop the individuals on my team. Working with them to mature in all phases of their role at AT&T (presenting, business planning, managing internal/external relationships, and driving results). Similar to a teacher, coach, or mentor, I get the most out of my team's success and the pride they take home to their families and personal lives. I believe we work to live and while hard work is unavoidable (if you want to succeed), achievement certainly ups the quality of life, income, and one's sense of progress.
Earlier in my career when I was a direct seller, I really enjoyed the customer interaction, the pressure to succeed, and the feeling of accomplishment when I was at the top of the stack ranking. In our field, the constantly changing technology and customer demands kept the job interesting too.
If you had asked me what I thought I would enjoy about my career when I was in high school, I would have been overly preoccupied with the title, company, or salary (none of which is the cornerstone of my enjoyment in my career).
Are you looking to start a career out of high school or heading to college? If the latter, you have plenty of time to figure out what you enjoy and what you want to pursue. It's likely to change as you get older too.