These two games probably have the best combat systems in FF, even if X is entirely turn based while X-2 uses a really fast paced version of the ATB system. X was pretty linear, but I ended up really liking the story and the summon system was fun to mess around with. Yeah X-2's story is pretty dumb and a lot of people will probably be put off by the shift in tone, but the mission-based structure and focus on side content made it really enjoyable for me. I'm also a sucker for job systems, and X-2's mid-battle job changing is great.