I don't know if I'm alone in this, but I just wish there were more social things rather than keeping it gameplay specific. Imagine if you could ask people how they are today, or where they are from, or what they would like to do? My suggestions...
Question: How are you? / How is everyone today?
Answers: I'm good! / I'm tired. / I'm feeling crazy! / I'm alright. / I've had a bad day. / I'm sick. / I've got a headache. / That's a secret!
Question: Where are you from?
Answers: Japan / America / Canada / United Kingdom / Germany / France / Australia / New Zealand / Eorzea / That's a secret! / Africa / Europe / North America / Asia / Oceania / South America.
Question: What do you want to do today?
Answers: Leves / Instanced Raids / etc.
I don't know. I find what keeps me in the game tends to be socialising, and I think it's so awesome that you can use the in-game translation tool to talk to people of different languages! But then... we can't talk about much right now.

I mean, even when you are at work and are speaking to customers/clients, you still give them the courtesy of asking how they are when you meet them. Just seems polite!