For me it's a time thing. Took a department head position 1:10 in, 1:40 home. Left a 0:20 in 0:30 home position for it. What I did not know was the company was in acquisition talks with a Texas company. The Texas company would take over my department. 13 months later. Lucky for me I am very good at work stuff. (guitar stuff; just ok)The company I left hired me back when I asked for a reference. So do your research before jumping ship.