I was a PS2 launch player that played until ToA came out. I bought the expansion pack and no longer liked the game.
I was a 75 BLM Taru with full merits, level 100+3 cook and I had every quest, mission, promy etc... done Heck I even levelled every subjob to 37 because I got bored. God gear, +1 everything and I think I had around 28 mil banked up when I quit for good.
There were no more challenges for me.
Same reason I stopped playing.
I don't know what I was primarily. Samurai, I guess, since I started a relic weapon for it. I loved Beastmaster though, and when I wasn't busy carrying people on SAM or NIN, I was meriting and listening to music in Boyahda Tree. Between Bonecrafting and Boyahda Tree meriting, I made enough gil to have +1 everything, most of a relic weapon, and even supported my IRL friend's Goldsmithing to 100. (Which actually made me money in the end, since he liked to throw me money on the backend once he was 100.)
I actually didn't complete my Yoichinoyumi before I quit, since a lot of my friends jumped over to WoW and I went with them reluctantly.
I don't know what I'll do in 14. I've played every role in WoW, healer, tank, damage, so I'm capable of playing anything. I guess I'll feel it out.