Dick Turpin in the late 70's as it was on TV.
Later on I remember being way too old at 12 to be pretending to be in Robin Hood but it went down a storm when I found myself accidentally the leader of the gang at a park near my friends house. A bunch of kids asked if we wanted to play and I leapt up and shouted let's play Robin Of Sherwood! They all shouted yeaaaahhhh!
That's a very Happy memory.