I haven't played many of them over the years, dabbling in different generations of it, so it's either Street Fighter 2 Turbo or Street Fighter 5 would be my favorite. At the core SF5 is a good game, but they just super botched the release of it in a terrible way. SF2T on SNES is just a classic though, even if it's abit awkward to go back to anymore. I'd love to someday have a real cabinet of it though.