Different breeds do have different temperements and individuals have different personalities too. I keep 3 breeds Jacob, Ouessant and Zwartbles. All are reasonably friendly as they are fed and visited frequently, however the Jacobs are the most suspicious, in as much as they do not like going into dark places or confined spaces.
The Ouessants are more friendly and will race up for food and will tolerate having their heads scatched ( though this sort of physical contact is not natural for sheep) the Zwartbles are by far the friendliest and most docile - they will follow me anywhere if I have a bucket of food and some of them actually seek attention and seem to enjoy it. We have 2 wethers that live in a small field next to our gaden. We have a small bench in the field where we like to just sit and watch things and "the boys" will come over and ask to be made a fuss of by putting their heads down and offering them to us. When you stop petting them, one of them will kick you with his foot and put his head down again for more fuss in the same way as some dogs paw at you when they want more attention. They also join us for a walk round the field and are the only sheep I know that will let you put your arms right around them and cuddle them without moving away.