I just checked my usage for the first time, and I'm actually quite surprised how low it is.
If I had to guess, I'd say I watch an hour or two of television a day, all streamed. The odd day I'll binge watch a show for like six-eight hours. So we'll call it an even 15 hours per week.
Also, curious what you guys pay. I pay $69/month for Extreme, 250GB max.