I will probably rotate through default 13 and EX8, Story 4, Battle 5 and 11, and Swimsuit 1 (costume code).Default Seth, color 14 is my choice, Nostalgia Seth looks horrible..
Seth has really good costumes all-around... except for Nostalgia. I don't know why people apparently like it so much. Even if you're actually nostalgic for SF4 Seth, it just doesn't look good on SFV Seth's frame.