10,000 steps

This article discusses the 10,000 steps and what numbers of steps are required for each activity level. In short:

<5000 = Sedentary
5000-7499 = Low Active
7500-9999 = Somewhat Active
≥10,000  = Active
≥12,500 = Highly Active

Personally, I'd like to be able to say, "I'm an active person." It's nice to have some sort of quantifiable goal, instead of just, "I go to the gym and do some stuff. I guess (maybe?) I'm active."