Locke. I can relato him personality wise, I like his story. I remember first seeing him and grey hair made me think he was some old man but after playing a while he was already awesome but when I got to his scenario and Kohlingen he really became my favorite.

Other favorites include Celes,Terra,Edgar,Setser, Gau, Shadow and Kefka. Well all the other playables are pretty awesome too. FFVI is just too awesome.