[oldE]

I was promoted from a supervisory position into a management/sales position for a small (<500 people) company.
I enjoyed being in a position to make things happen, to bring along people with the right skills and attitude and to provide that communications channel between customers and the company.
The down side? Loss of time with my family. It was NOT 9-5. After it was all over, I realized I no longer hated to hear the phone ring on the weekends.
There were things I could not change about others (and myself), so sometimes ideas either had to wait, be abandoned or compromised in their execution.
Your experience will be determined by the management team and your relationships with others. Most of your success will hinge upon your ability to glean the important bits of information out of the mountain of crap which is generated by people who don't understand what they should really be doing and communicating those bits to the people who have to have it.
There are days when it is the best job in the world.
Les