Overall:
So first things first, I'm a fan of SAO and enjoyed what I saw of it (haven't read the light novel), but I do think that it's a bit overrated. All the praise SAO has been getting is a bit exaggerated in my opinion. Nonetheless, I still liked the show.
I would actually give it a 3.5, but Crunchy doesn't allow that, so I guess I'll be generous.
Note: Spoilers are specific points that I complain about. May or may not contain spoilers (all the events are at the beginning though, so it doesn't reveal anything really)
Plot:
This show had MAJOR potential as many of you may have seen from the first episode. It was thrilling, eventful, and really well done. But then, everything sort of just went downhill from there. Don't let that sentence scare you; as I said, it's still a really enjoyable show. The pacing of the SAO arc was terrible. Things didn't flow together, time didn't seem to flow right.
Spoiler Alert! Click to show or hide
One problem I had was the fact that it took so long to clear the first floor, but such a short amount of time relatively to clear the other 70 floors.
They could have done so much more if they expanded on the actual adventure and let us see more of the SAO world. Actually, it might have been better if they had the SAO arc as a 25 episode season. If given the time, SAO could have explained things better and created more atmosphere and emotion. The psychological aspect of SAO could have been expanded on. The first episode made me think that there would be something more in terms of watching how characters acted.
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The whole part with Sachi was done poorly. I didn't feel all that sad for Sachi; she didn't really have a story, or any role at all. She was just sort of... there. She was a very shallow character with no development at all that just couldn't manage to make me cry for her death.
The psychological aspect isn't really built upon and what they did try to do just ended up becoming filler because of the poor execution. That's a loss on SAO's part. It had such great potential that it didn't utilize.
Characters:
Cliche. Kirito's awesome and OPed. He's the hero. He's the one who saves everybody. Everything goes his way. But hey, that's a lot of animes. In doesn't take away from the experience. My problem was that he didn't have much character for the SAO arc. He was a bit too... dull. Most of the characters were actually kind of shaky.
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I still don't understand why Kirito treated Klein so coldly in the beginning. Would you stop being such a weirdo? You're so kind and helpful one moment, and the next you're jaded and too cool to even look others in the eye.
None had much personality, and all were pretty bland. There wasn't much character development, and that goes hand in hand with plot development. Again, the psychological aspect would have done wonders here. Still, some characters were really solid and worked well. Of course, some of these characters were filler and completely unneeded. Lisbeth for example was a filler character. Inter-character development could also have been worked on. The character designs were beautiful.
Visuals:
I loved the art style of SAO. It's just one of those styles that is easy to get used to and easy to like. The characters were designed well with everyone's personal styles displayed. It also let you get the feel of how they fought. Along with the characters, the landscapes are also beautiful. The art is very consistent throughout, and so is the animation. The futuristic gameplay animations were awesome. I enjoyed the little first person POV parts where we get to see the game from their own eyes. The fight sequences were nicely done which is always a plus.
Audio:
The voice acting for this show was pretty well done. Everything seemed right, and nothing came out awkward. Pretty run of the mill stuff. It's good I would say. As for the music, the little tracks played throughout the anime were fitting and timed right, helping to add some atmosphere. The opening and ending themes were pretty standard-- again, nothing special about it. They were good songs mind you, just not anything I instantly fell in love with.
Extra:
I didn't really consider the ALO arc in this review of mine because as I stated previously, SAO would have done better with 25 episodes devoted to the SAO arc. But to get the other season of this anime, here's some extra thoughts on the ALO arc. I stand by my previous statements about the visuals and audio. As for the characters, Kirito progressively got more solid, and his character became more well defined in this arc. Sugu was also a pretty solid character-- not sure why a lot of people dislike her.
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Her actions are entirely believable, and just as a note: It's not incest. She didn't do anything other than confess. So what if you like your cousin? It's understandable that you'd probably fall in love with them after they suddenly do a personality switch and go from uncaring and cold to loving and kind (especially when you've been craving their attention for years).
The villain, I agree, is just way too... cliche and shallow. He's just a creep. Definitely not the best villain.
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And the perverted creepiness just threw me off-- I don't want to see Asuna get nearly raped. What is this. Just stop it. And tentacles?! Since when did you have to turn to fan service to pull in views SAO?!
One problem that persisted through the SAO arc to the ALO arc was the lack of psychological development and the inconsistency of the characters' mentality.
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Kirito, stop hanging out enjoying yourself with those clan leaders, go save Asuna already.
Anyway, the plot was not as interesting as the one for the SAO arc, and it had a pretty slow start, but once it picked up, I found myself sitting at the edge of my seat again as I waited for the next episode.