What's with taking sides? Can't a person play both WoW & FFXIV?
While I don't really play WoW anymore, I have always found it amusing that part of playing FFXI/FFXIV should imply/include not playing WoW.
Honestly, I picked up WoW a few years back as something to do while LFP in XI. Put flag up, alt-tab and bring up WoW, play WoW until I get a party invite, hearth, go party.
I don't play XI or WoW anymore, although I got a random hankering for it so I am probably going to reinstall WoW and play by myself on a private server for a bit. Still, I never got why Playing XI/XIV means you -have- to hate WoW.