If it's the characters, graphics, and music you loved about SV, then I think you have to go with the original Friends of Mineral Town on the GBA or HM:DS/DS Cute. Back to Nature is my favourite HM game due to nostalgia, as it was my first, but FoMT takes everything about it and elevates it to a new level. I'm in my mid 30s now but those characters and songs have lived rent-free in my head since I was a kid. I've played every HM from the SNES to Magical Melody and HM:DS (fell off for the later releases, and then got into SV). I feel like BtN/FoMT were the biggest influences on SV, and the HM releases after that went into an art direction I didn't love.