For Harry, it was his parents ... for Ron, he was head boy and was holding the Quidditch cup in his hands ... for Dumbledore ... well, it wasn't a nice new pair of socks as he claimed in Book 1.
But what about you guys? If you were to take a glance in the mirror of Erised right now ... what would you see? What do you think is truly your heart's desire? Do you have to think about it a little bit? Is it something obtainable? Or is it actually something that you will never be able to achieve?
For me ... I think that I would see my mother. Just once ... one more time. I'd see her giving me a big huge hug. Over and over and over again ... just one of those hugs that wraps you up and keeps you safe. There are a lot of things in life that I want, things that I want to own, to accomplish, things that I want to do before I die ... but my deepest ... darkest ... main desire ... is to see my mother again. Isn't it interesting ... that I couldn't stand to go over to her house while she was alive and now this is the deepest thing that I want now?
The world is full of Irony.