I checked 1-2 hours because that's what my one-way time is currently. When it was about 40 minutes (7 miles) each way I commuted most of the time. At about 1:15 (17 miles) for my new office, a couple times a week is good these days. This morning took 1:40 due to a flooded river crossing. Still beats driving.

Part of the problem is that in January we became empty nesters. We have dogs, though, and if my wife is working late I feel like I need to get home ASAP to attend to them at the end of the day. (When my son was still home, he could take care of them.) With that, it's been tough to commute as often as I'd like. The distance isn't the killer, it's the extra time in the afternoon.