ff2: Frioniel, Maria, Guy, and Layla (because she is the best fourth character evar)
ff5: Bartz, Lenna, Faris, Galuf (mime mime mime mime)
ff6: Shadow, Edgar, Terra, Locke
ff7: Cloud, Yuffie, Vincent
ff8: Squall, Rinoa, Irvine
ff9: Zidane, Amarant, Steiner, Freya (steiner annoys me, but he's too friggin' useful)
ffx: Auron, Yuna, Rikku. (mostly decided by celestial weapons, and *then* by coolness)
ffx-2: Yuna, Paine, Baralai (XDDDDDD)