Female miqo'te /panic is adorable! I have to do it every dungeon, every time I meet a friend, and before I log off. Must /panic! I like the way the wind picks up on the isolated points, and you can hear it sometimes when fishing with a quiet bait. The Foreseer K'lyhia storyline -- love it. And in cutscenes, I love the way your character nods. I don't know why but I really really like it. And the fog that always rolls into Limsa. And the way the NPC's look at you (the miqo'te tradecraft supplier in Gridania always does a /welcome when you target her up close!). The always-stormy South Shroud.
You can see all the little details in the world if you but take the time to look for them. It always saddens me to think so many people miss that.
Did I mention the glowy signs at night on the roads outside Limsa?