When first played the game long long ago... the character I envisioned was more like this guy from the original 1.0 video.
https://www.youtube.com/watch?v=HPG-rIeTYYY
Back then Heavensward had just come out and there was still come confusion between 1.0 and the ARR for people who had never played 1.0. There was some deep lore in that version, and it connected into 2.0, but if you had never played 1.0, then it was kinda lost on you.
I had also played FFXI where I played a Hume Red Mage in San D'oria.
But when I joined they didn't have that class in ARR or Heavensward. So I picked the Arcanist so I could start in Limsa in order to become a Summoner. It seemed like a good all arounder with flexible abilities to be able to handle anything even if not the best at any one thing. Didn't even know about the Dreadwyrm and Deathflare yet. Turned out I really loved it.
But my character I envisioned, was always like that original adventurer in the Tavern Video. No one special, just an average plain old adventurer, working for coin and seeing the spectacular things in the world. It was always about dungeoneering for me.
In time I would get to see the things the video shows, or at least the result of them, but they didn't come until the end of ARR and the beginning of Heavensward. (Well ok the Marlboros come a little earlier)
Still, that is what I envisioned for my actual character.