Why roll a pandaren and go Alliance?
(Spoiler for the end of the Alliance pandaren quest chain in the extended entry.)
They’re fun and bouncy! They’re better animated than most other races! The plot line for the pandaren start zone is interesting and fun! Great racials! Everybody goes “oooh, Pandaren” when you walk into Stormwind!
You get to punch Varian Wrynn in the face. :D