the true is,
I love FFXIV , because it is fresh and it runs a theme i like. FFXI is my all time favorite, best FF in my book.
I never like FF7 or 6 like most people here. I actually think ff8 got a great story and ff9 is very good as well, also i really like FF10 and x-2, however 12 and 13 is horriblely main for game play, but story is pretty good.
If i have to rate.
Strong- FFXI, FFXIV, FF9, FF10 + x-2, FF8, FF6, 5, and 7. I can't rate the rest, i don't like them at all, 1-4 is pretty boring as well.
I am serious about the fact i found FFXIV is better, if it isn't i wouldn't played that game for last 6 months and played it more hours then other FF (beside FFXI).
If you talk about sad theme, Lion scene in FFXI or Prishe (ending or even TOAU ending, FF7 crisis core zack's ending, FFX's ending (before X-2 is out) is definitely not worser then FF7 aerith.