These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Archive Panic: Good luck watching the whole franchise from start to end. Leaving out the two webseries, the series totals 384 half-hour episodes and four feature-length movies. That's roughly six days. The tie-in comics add another 271 comic book issues.
Cant Unhear It: The voice acting of the DCAU is so iconic that its fans generally read DC Comics in the DCAU's voices. Kevin Conroy as Batman and Mark Hamill as the Joker tend to be the biggest cases of this (as each had been around since the DCAU's very beginning with Batman: The Animated Series)
Hype Backlash: The DCAU is put on a high pedestal. Its descriptions of characters are called the definitive versions by fans. Every other superhero animated show (and even live-action versions) are compared to it. As a result, some people can be confused by the praise and find it So Okay, It's Average. It doesn't help many other superhero shows borrowed from it, causing Seinfeld Is Unfunny.
Magnificent Bastard: Lex Luthor, depending on the author. And there're also the Joker, Darkseid and Grodd.
Tough Act to Follow: The multi-series continuity, art style, great writing and voice work ensures that successive series, ranging in quality, have a very high standard to meet.