Stepping off the boat into Limsa Lominsa for the very first time. Followed by running around the place getting completely lost >.>
Before then finding my way to Baderon and trying to figure out what the fudge he was actually saying doing all the newbie quests :3

Nest most memorable moment, was hitting level 30 for the first time and getting my very first Soul Crystal and Job :3
It felt so cool to advance into this powerful Warrior with cool new skills!

Entering Ishgard for the first time was also really cool, if slightly annoying (Since I wanted to try out DRK...) so getting to the quest where I could actually enter was super cool. Then finally entering the place... Then running around and getting completely lost >.>

Entering Eureka for the first time. This place that was full of wonder and excitement about being interesting content... Then it ended up being memorable for all the wrong reasons ;_;