I had one job as a contractor where I got hired as a temp. After 6 months they wanted me to join as an employee, but I turned it down because it would have meant travel. They kept re-upping me for 6-month intervals, and it was a good feeling to know that they truly wanted me there. Also, I didn't get a year end review, so I just got to keep working while the other engineers got called in one at a time and then came out pissed off about their lower than expected raise. :-)