I want to tank in FFXIV, like I do in other MMOs, but my play time can be limited.

I was wondering what queue times can be like? Playing a tank is most fun to me when you're... well, tanking. And if I'm going to spend a lot of time in queues, that could both kill some of the fun for me, as well as make it hard to make any real progress, due to my schedule. Anyone have an answer? I'm praying to Oschon that the answer is that tank queues aren't bad.