The problem with the Queen is that you've got to address her in the proper Queenie way, else she won't talk to you. And even if you do address her properly, it's rare for her to talk.
Now the Duke of Edinburgh is much more friendly. He comes up to you and speaks to you first...all three times I've 'met' the Queen, he's been the one who has talked to me...and the rest of us there for that matter...