the unforeseen pitfalls of success
It is all too easy to focus on the pay increase when one offers you a promotion. More burdens and responsibilities naturally come with the territory, and management will rarely be able to completely sugarcoat these aspects, but the dollar signs have a way of trumping any of the standard trade offs mentioned in the initial offering.
Still, you think you know what you're getting into.
However, the little things are the hardest to anticipate. You never think about things like having to communicate with your bosses directly on a more regular basis and how it will eliminate that lunch hour generally spent drinking in your car alone or how the subsequent lack of that special "Rextime" was all that separated this from a "real job" and Rex from a downtrodden "worker".
I guess I never really thought about people actually living like this.