The more I replay older FFs the more I realise I don't consistently love the series a whole, much like how I started noticing the same towards Legend of Zelda.
Meanwhile in a series like Castlevania, in which people love to pick entries to label as bad or black sheep, I found I have a nearly unconditional love spread across every official game. Come to think of it, it might be the only long running video game series I feel that way.