I love these little creatures! So pretty!
When I used to live in Virginia I had a feeder on my porch and they would fly up and eat while I watched. One time I had just cleaned the feeder and was trying to hang it back up when a hummingbird flew up and kept hovering around me waiting making these little squeek noises. When I finally got the feeder hung up, he flew up and started eating while I watched. I was so excited!
I think they are territorial too. I once saw 2 fly up to my feeder and one chased the other off.