I don't really hate newer games in the series as much as I'm fed up with JRPG genre in general as of late. While it did offer a lot of fun and a few truly epic games (FF VI, IX, XII) Final Fantasy as a franchise has been mostly hit and miss to me, I do however plan to beat every game in the main series (aside MMOs I have only XIII to check off my list), although I don't feel it's necessary to go through every game to call yourself/be a true fan, no need to force yourself to go through games you don't enjoy in the first place.
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