I work from my home. I can't leave work at work. I'm always there. My colleagues on the east coast are also workaholics. I get calls at 9:30 PM MDT from them. It's 11:30 EDT and they are working in the integration lab. There is no escape. The zero commute is nice. I can start my day without my blood pressure being raised by jackasses on the roads. The respite is limited...the phone will ring and jackasses will be on the other end. It's still better than spending an hour in traffic.
That knowledge is the only thing that makes me answer the phone some days.