I always use the default party...being the nerd I am.
Anyways, since I use *whisper* the FF1 NES rom I only have four letter names, lol. But that doesn't stop me!

Fighter = Cid (since this is one of the ONLY FFs without a Cid, I had to remedy it).
Thief = Luka (light)
Black Belt = Ryuu (dragon)
Red Mage = Sora (sky)