I am getting that itch again. What is the most "Worth it" version of Wow right now.

I had a legendary run of wow. I played Vanilla to Wotlk on the original release.

Then I played Vanilla to Wotlk on classic re-release.
Then I played SoD.

I was interested in Cata, but just never really got the chance. Was off the game both times around.

Kinda feel like getting back into it. but not sure if I should play MoP or just bite the bullet and hop into retail for the first time. Not particularly interested in MoP. Pandas are lame.