Lacey isn't super vocal, unless I haven't been out in a while, then she'll whinny for me. Usually what she does is as soon as she sees me, she'll stop eating (the girl is always eating, I swear), put her head up, and just watch me come over to the gate. Then, depending on how bored she is, she either will walk over to me or she'll stand watching me until I get to her, then she likes to put her head on my shoulder and just rest it there. Then, after doing that for thirty seconds or so, she backs up and waits for me to scratch her face and put her halter on.
If someone else has gotten her out of the field and she's not sure what's going on (like if we're about to trailer out somewhere and I'm late) she'll nicker and nicker and nicker as soon as she sees me. And she'll try to be as close to me as possible, in as respectful of a fashion as she can muster in her excited state. if I leave her side, she'll start nickering again and continue until I get back next to her. It's my favorite when she does that, I feel so needed! Haha