I was curious when going into a management role as to what the transition would be like. After all going from 'one of the gang' to the boss is a big move.
And while of course I can't go into great detail I can say with 100% honesty that its the people around you that change and treat you differently.
You will notice it the first time you walk into a room and a conversation abruptly stops, or when the lunch invites dry up.
Apparently this is par of the course and the only ones that don't know about it are those that aren't in management.
I am often surprised to find that something actually surprises me!