I might be biased, but the Lala.

When trying to get my desired recruits, the same two Lalas kept showing up from the crafter challenge log entries for a couple months or more until I kicked my initial Lala from the top of the Bismarck to let in Toragana from elsewhere. Suddenly, I got every other recruit the crafter entries could offer until I met and accepted Yehn. Then, as I tried finishing up the last recruit or two, the same initial Lala kept coming back, no matter how many times I turned the bugger down, until finally I was done.

All five Miqo girls, one Miqo male, and two Au Ra girls (including the pirate). Lala free and proud... save for the guy I talk to to send my squadron out on missions. He's alright, though. Dude watched my stash of Gaelicatnip and mounds of gil while I swapped GCs to grind Frontline wins for a mount. muahaha!