These two are my favorite of the Phantasy Star series. I like Phantasy Star II, because of the characters, environment and music, and I like Phantasy Star III because of the uniqueness of it, and the characters. My favorite characters in the series are Rolf, Nei, Rhys, Mieu, Maia, and that girl who's Lena's daughter if you marry Maia in the first generation of PSIII.
I think these two are also two of my all-time favorite games, and I don't even like RPGs that much! I want them to put Rolf and Rhys in Sonic And Sega All-Star Racing (in addition to Blaze, Axel and/or Shinobi). The classic Phantasy Star titles don't get enough love or recognition these days. All people ever talk about is Phantasy Star Online, Phantasy Star Universe, or any of the ones that came after it.