X/XII are great choices for their emotional impact. XIII and Type-0 are good choices if you like fast paced combat (fair warning, it does take like 20 hours before the XIII combat becomes actually engaging). VI and IV probably have the best 2d stories, assuming you don't count Chrono Trigger as a Final Fantasy, I do count it as one though. XIV is great if you're looking to spend another 200+ hours playing and it's also one of the few FFs to make me cry