Ten miles is probably my cut off anymore. I did a fourteen mile commute for a bit. It was just too long. Didn't help that it was all downhill going there, and all uphill going home. I could do ten miles though.

I much prefer my three mile commute to school and rather enjoy my six mile commute to work.

Looking at a new job which would be almost an eight mile commute, but it would be a rather enjoyable commute along a nice MUP.