[«SmG» Cloud]

ill agree with @SmG Phoenix

[SmG Speedy]

I'd say watch SAO season 1, then go Fairy Tail.

[AnaRCHy]

I am researching Sao.... It is just so good

[Ajin]

Hmm, I would also go for SAO first. Its shorter than Fairy Tail and it might be more enjoyable in my opinion.

[Rose1]

My choice is SAO, my main reason is because sao is very enjoyable and I still go back just to watch it again and again every now and again. It has a good amount of seasons and episodes, so its not too long and drawn out. Another one of my reasons is because, yes there are sad part in sao were you will feel sad, Because sao makes you either dislike a connect with a character or dislike one via your preference or not. Those are my reasons.
That and I am a lot like the main character in sao.

[SmG Jupiter]

Sword art online !!! But season 2 is dead asf. Watch all of season 1 and then season 2 episode 1.

[TeXusTheKats]

SAO if you don't like anime with many episodes . Fairy Tail if you like anime with many episodes. I know that Fairy Tail has around 276 episodes so ye , good luck.

[SmG Sammy_]

Sao cuz idk

[SmG Shane]

I don't watch anime anymore...

[SmG Kowri]

I dont know which one to watch first! Sword art online or fairytail?

Sao ftw! The first half of the first season is good, it goes a bit downhill from there but i was hooked! Its my first real introduction to anime so i respect it.