My mare picks up the foot she wants me to clean first, haha. It doesn't matter which side I'm on, if I have a hoof pick, she picks up a front foot, the other front foot, a back foot, and the other back foot. Gracie, my yearling, has finally picked up on it too. Her feet are cocked and ready, lol. =]
We used to have two horses turned out together in a large field. One was essentially retired - so he was only brought out a few times a week. The other was getting ridden 5-6 times a week. So I'd go out to get the one to ride, and the other would walk away all the time and no one thought twice about it until... someone went to grab the older horse for the farrier and he had learned that by walking away he didn't have to get caught. So of course they walked after him and he took off to the other end of the field (roughly 600ft)... And then the other horse started running.
So then they both think this a great game! To catch either of them for a few weeks after that we had to corral them both into a small pen at the front of the field. This required 3 people, one to go down to get them running (aka walk towards them), one to get them into the pen and another to close the gate. Once we got them in the pen, they stopped and just stood there -_-
Eventually we broke the habit - thank goodness!
All of mine cock their feet for me. Not pick them up completely, but as I walk to each hoof, they'll take their weight off of it. Daisy and Loot respond to the words "give it" - they pick their feet up for me.
And they all come in to "HARSES! COME EEEAATT! FOOD!!" in a really high pitched voice. :]