Well, I myself am a smacking brute in RPGs, so I'm not much of a magic user. Basically the only magic I use are the healing spells. So, yeah, the independent is my favorite. All of the HP boosts and using Mega All. Of course, you don't have much to use all in conjunction with without command materia, which is my second favorite. After that support, then summon, and then magic materia. Don't much care for the Holy and Black, though I'd say I like Holy better because Aeris is my fav character and that's who uses it.