Both Resident Evil and Final Fantasy are two series I have a love hate relationship with.
Echoing this a bit and realizing I'm late to the thread party.
Resident Evil was my favorite series from 1996 to 2009 when Uncharted took over the top spot. Unlike Astralsoul, however, I loved RE5. For me, it was RE6 that was the start of the downhill and it was a cliff. RE6 still had moments of fun but didn't know what it wanted to be and ignored Jill's recovery story alltogether, instead opting for Jake and Sherry. I mean... why Capcom? It was also around this time that I started to just not care anymore about horror games in general. When they decided to give a middle finger to the third person action oriented crowd and go first person horror, the series was officially done for me. Of course, I believe the main arc of the series was completed at the end of RE5. So... I'm fine with the series officially being over if it ever comes to that.
For Final Fantasy... there were so few that really captured my attention. While I started gaming on the NES, the FF series was never on my radar until FF7. That was my first and it was incredible. I tried 8 and didn't care. Tried 10 and enjoyed it for the most part. I even tried 13 and didn't like it all. That was kind of it for me until the Remake of FF7 which was incredible, but it ends at the same damn spot that my glitchy PS1 copy stopped working. So since 1997, I've been stuck at the same spot in the story. Of course, I know all the major plot twists as it's been more than 25 years, but still. Glad to finally be able to continue the story in a few days.