You know? Im not sure yet. I recently made a 1.8.7 single file so I can finally conquer and loot the guardian temple. Ive beaten the end once with mods but I want to try and beat it with vanilla style. Pretty much if I haven't done something yet im going to on this map. When 1.9 comes out I'll wait a little before fully diving into it.
I'm playing all my favorite 1.7.10 mods like Tinker's Constructs, Orespawn, Chocolate Quest and Harvestcraft. That way I'll have gotten all that out of my system, so-to-speak, and be ready to play vanilla when 1.9 is released.
Haven't really cared or prepared me at all. The hints the dev team kept spitting at us became really boring really quick, and I'm not really sure I want to believe the new snapshot comes tomorrow. But if it does; Time to explore the new stuff, and update a ressourcepack.