My first was FFI via NESticle on DOS, but FFIV on the SNES was the first one I put real time in to.
My favorite is FFVI. I replay once a year or so.
I guess Battle With the Four Friends is my favorite piece of music. Fuck that's a hard pick though. I jam out to all the battle themes as well.
Most memorable moment is the opera scene in FFVI. It blew me away the first time and I still look forward to it on every replay almost 30 years later.
Smoosed