I have 10 mares, they are all friendly and enjoy being scratched but they are not pushy. They will come seek attention but will not be rude about it, well my old molly mule had many years of being pushy & spoiled before we got her so sometimes she forgets. She does remember her manners pretty quickly though, unless it is an unsuspecting person visiting.

"It's really quite amazing what a horse will do for you, if he only understands what you want. 
And it it's also quite amazing what a horse will do to you if he doesn't." ~ Bill Dorrance