Saw the movie. Long yet enjoyable, but it doesn't make you really think and as a result felt very boring.
I liked the explanation that Arthur is this big brute who solves problems using his anger and fists and that explains why his mannerisms are the way they are, but I would've enjoyed it better with less of his unnecessary cursing. The cursing was sporadic, unnecessary, and had little effect. It felt like Aquaman had the brain of some college frat boy. Wish there was more depth to Aquaman's mind, maybe more conscious reasoning or even more brooding. It was always just "I don't want to be here," "Fine, I'll do it, "Get it over with," "I don't want to be a leader." Felt whiny with little introspection. I also didn't like the neck tattoos on Arthur. The arm and body tattoos looked great, but the neck ones and the yellow eyes made the character look overdone.
The plot was good. The execution was a bit too Michael Bay's Transformers. Too many explosions and too many lights. For example, the scene where Aquaman and Mera first enter the ocean, on their way to Atlantis, could've been better if it was a darker ride into the abyss with light here and there emerging from the nooks and crannies as they pass. Something like the drives done in Tron Legacy would work well. It would create the atmosphere that the ocean is a vast space with many unknowns. Instead, we enter the ocean and there are instantly a million colorful creatures awaiting us. Too much flavor and lack of negative space. We get a million lights when we hit civilized Atlantis either way so why not build up to it.