Hated FLCL: Progressive. Felt like an unnecessary soulless cash-in sequel in the same vein as Adieu Galaxy Express 999 and the Rebuild Eva movies.
Went back and watched the original series to make sure I did not unwittingly have a pair of nostalgia goggles on so tight that they were cutting off the supply of blood to my brain. Almost 20 years old, and it has aged like fine wine:
-Characters that are fleshed out and worth caring about, lending itself to emotional investment and truly touching, affective, and memorable moments. In contrast, outside of maybe Haruka herself, Progressive has a mostly flat and forgettable cast, lending itself to an overall experience that left me feeling nothing.
-Much better soundtrack, and much better use of The Pillows.
-Despite being chaotic, eccentric and experimental, still has a plot and themes that can be reasonably followed and deciphered with attention and repeated viewings, in contrast to Progressive's sparsely explained nonsense, along with some blatantly lazily regurgitated elements.
-Despite going on 20 years: objectively overall superior animation, cinematography, character/creature/mecha design, experimental elements, and action choreography, to it's 2018 sequel.
I'm going to go ahead and watch Alternative out of morbid curiosity, but I predict that like the original Eva TV series and movies to the Rebuild Eva movies, I'm probably just gonna continue watching the original FLCL from time to time and pretend the sequels don't exist.