Wasting perfectly good backstories (with a few exceptions, like VI and X-2) of the characters, sometimes not even establishing why the characters are along at all (X).

Milking games for MOAR MONEY without actually adding anything worthwhile. (By which, yes, I mean the Compilation.)

Having less traditional and more innovative gameplay, concepts, music, etc.

The fact that people complain about the newer games while they ignore all the flaws in the older games, such as the weird pacing, under-developed characters, and cartoonish villains.

Not saying that IV and VI aren't good games, but they're not perfect.

Also it bothers me that people complain about Nomura's character designs when Amano's were just as silly. Pretty-boys, 80s hair, beads, blue lipstick, capes, and women in even MORE revealing outfits than Nomura has ever designed—and yet people act like Amano can do no wrong while Nomura is the Anti-Christ or something.

The recent obsession with having the "main character" be an Idiot Hero who acts as The Watson and The Ishmael in order to give easy excuses for world Infodumps and because, you know, You Suck.