My favorite June MC is most definitely the Cloud, from June 2011.
~ I love it because it was the very first June MC I bought, and the first one I bought ever. I was new to Gaia, and the cloud just hooked me to this site. It is such a great item because it goes with virtually everything, and it just adds the touch of fluffiness that every avatar needs. I bought 5 clouds when I had first seen it. I also believe it is such a useful and beautiful item. It really makes you feel like your soaring among the clouds. I had quit for a brief time, and I made sure to always keep that one item. :] I think it works with so much, and it helps present the avatars mood and really help other users understand it. :]