Random question - what's the vibe usually like on your commutes?

Since my commute is 15 miles or so, I usually ride as fast as I can because it's probably just enough to get a good workout. Every now and then I take it easy in lower gear, but then it seems like I'm not working at all. The time difference between these two mindsets is literally about 6 minutes, so it's inconsequential.

Just curious about you guys