My neighbor had a free range tom who would walk around the big garden and eat the bugs. He was the friendliest bird I have ever seen. he actually came when called and loved to be pet. Loved haveing his chest scratches.
On the other end, I know someone who wasn't so nice to his tom. When someone comes to the house, it's a foot race to safety. The owner has to trick the turkey to go to the passenger side so he can get out the driver side and run. I was told that he would push the bird away with his foot when the bird would get a little aggressive. Now he's alot aggressive. if you want a non aggressive bird, i guess you need to lead by example.