I had a manager years ago who did that. Didn't motivate me a bit. What motivated me was the money I was making. I didn't care what anybody else was doing. My attitude spread to others and it wasn't long before the rankings chart disappeared.
I'm the same way, but still never wanted to get beat. However from a company owner standpoint, your motivating factor (the money you're making, which is of course an amount that you chose) is not necessarily what the business needs it's agents to be producing to meet the company's goals. A top agent can make the most money but also have the highest CPA.Sounds like you had a great impact on your coworkers with your attitude spreading, but that is not the norm in a multi-caller environment.
Tracking metrics is essential when having 1 or more agents. Showing them a leader board of course isn't necessary, though I've never seen it have a negative impact.
Metrics are the unarguable facts you present to agents when meeting, or especially not meeting company expectations.
If you work alone, then you should still have a leader board. You'll be #1 every month!