A few years ago, I worked for a consulting company for five years, which during that time (and somewhat still today) was quite a long time to remain with one company. It was a common occurrence for clients to offer me positions in their companies, but this practice was strongly frowned upon by my employer, who actively discouraged such recruiting. I never ended up accepting any such offers, but they did have the effect of keeping me aware of my marketability and of the existence of...