I read 196 LN's in 2019, so there is a lot to think about with what I read through the year.
For me, the big winner of the year was Seven Seas getting Mushoku Tensei. This was the first LN/WN that I ever read, and was the one that I wanted to have in my hands the most since I started reading LN's. I still haven't read something that I enjoy as much as I enjoyed this series.
New Series -
YP - There were quite a number of new series from YP this year that I enjoyed. Probably the one that I enjoyed the most was Our Last Crusade or the Rise of a New World. This one kept getting hyped up, and it didn't disappoint. I can't wait for the second volume to arrive soon. Bonus points to YP for also licencing DxD this year
JNC - There wasn't too many new series that were that good for me. The one that I enjoyed the most was Record of Wortenia War. I didn't know much about it when I started reading and really enjoyed it. Although I'm reading Altina at the moment and still have The Holy Knight's Dark Road to read, so this might change.
SS - Other than Mushoku Tensei, the new one that enjoyed the most was Reincarnated as a Sword. Although I also did quite like Skeleton Knight and Classroom of the Elite.
SP - Rakudai Kishi. This was the other series that I most wanted to see licenced after Mushoku Tensei and DxD. I haven't read it yet since the physicals haven't been created yet, but I read the fan translations years ago. I haven't read any of their other series yet because of their record as a publisher, however their new editor says that they are changing things up there. So this will be my test with them to see if they screw it up or not.
Continuing Series -
YP - Would be a tie between A Sister's All You Need and Konosuba. Reading these series is always a great time with many laughs and usually finish these in one sitting because I don't want to put them down.
JNC - There are always a number that I can't wait to read like Arifureta, Realist Hero, Demon Lord, Ragnarok, etc. But the one that I probably enjoyed the most has been Seirei Gensouki. The longer the story goes, the more I enjoy it, and now I usually finish these books within a few hours of starting because I can't put them down.
SS - Toradora. Only a couple more books to go until the conclusion, I'm looking forward to seeing how the author will finish this off since I went in to this series not now much about it, and have been enjoying it.
Licencing Hopes for 2020
There are a heap that I would love to see come to us in the next year, but here is the short list.
Gamers, Akashic Records, Data a Live, Oda Nobuna, Campione!, Hachinan tte, World Teacher.
I could keep going but it would be a really long list.