Sword Art Online is an anime I find to be highly enjoyable to watch especially with all the virtual adventures filled to the brim with action packed sword fights.
The plot is well developed and does a really good job at bringing out the best potential for this anime, the concepts and elements that make up the story play a big part as well in my opinion.
The character development is probably by far one of my most favorite parts about this show. The characters grow and mature at a very acceptable pace in terms of the story speed. The character interactions are where my interest lies though, its pretty amazing how people can change in a virtual world and how it can either bring you closer together or even farther part is pretty interesting.
The graphics and animations are done well and have a pretty big impact on the viewer in my view so good job to the studio.
Overall I would say this is a show worth checking out especially if your a fan of virtual reality!
You can find out more at https://myanimelist.net/anime/11757/Sword_Art_Online.