Since the first episode of the series I saw potential. I liked the protagonist and was about to embark on a fun little adventure world. But the thing is, I didn't know that this same protagonist was going to become one of my favorite female protagonist ever.
About the anime, the soundtrack is spectacular. The worldbuilding is soooo well done at Light Novel (where the story shines), it looks like a dazzling light, it shines too much. The cast has become one of my 10 favorites of all time. A good cast with a well-built world.
Slayers' story takes place in a world created entirely from scratch by the author and I imagine the work and effort of having built something so well done. You can tell by the size of the story (there are almost 50 volumes)
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In addition to the very well built world, the cast is awesome.
It had been a while since I fell in love with characters in a series. The passion is so great that I could rewatch Slayers again and again, just to see them, but this is personal, subjective, my own opinion, 'cause if you like the characters or not, that's up to you. And it's with them that the comedy works very well.
The chemistry of the characters works very well.
Attention: Slayers anime is 90% filler
I would say it's more of an inspiration than an adaptation, because the anime manages to stand alone. Proof? From the third season it's all filler, S1 almost everything filler and S2 has until the end filler.
Slayers (anime) has more focus on comedy;
Slayers (Novel) is more serious, seeks to further develop and build the universe.
There are several changes from the anime to Light Novel, it can be said that they're very different.
So, Slayers (anime) will have an open ending, a world that may not have been properly explored to its fullest, and pretty original content.
The decision in the end will be yours. If you enjoyed the series as much as I did, go and read the Light Novel. It's already "finished" - the author recently returned with the series to celebrate the 30th anniversary with a new Arc.
I watched Slayers' first two seasons and loved it. The series as an anime is very funny, where I met all the characters and created love for the series as a whole. Lina is a self-confident, proud and very cheerful protagonist, she's one of the most positive points of Slayers.
Out of curiosity: Slayers is one of the 3 best selling LNs of all time.
It was one of the best series I watched and read in 2019.