Well, your avatar says "Devil Dog," so if you're a Marine (or a wannabe), you have zero chance being stationed there. They're all up at Camp Pen or Mirramar.
For the Navy, if you select HS, you'll go there no matter what, as their FRS is there. Then you'd transfer back to Jax of you got HS East. Otherwise you'd have to select HSL-West or HS-West or C-2s. I don't know what the plan is w/ the S-3s. I think they're just going away, so who knows what they'll do w/ the hangars. As for selection, it changes from week to week. It's all needs of the Navy.