 If you liked
Sword Art Online
|
 ...then you might like
Kimetsu no Yaiba
|
Really well animated fight scenes with swords. That's the one thing that got me to watch SAO, considering how great they were, so I ended up really enjoying Kimetsu no Yaiba as well.
Oh and both the first OP in SAO and Kimetsu no Yaiba are done by LiSA. That's stuff's the shit.