I’m personally only interested in fantasy and/or isekai stories so I’m going to recommend my favorites in that genre:
Ascendance of a Bookworm - on the surface a nice little story about a reincarnated girl who wants to create books in a world where they are beyond her reach. Below the surface, the struggle and division between classes are a driving factor of the plot. It’s exceptionally well written, and the isekai aspect is more than just a narrative crutch. The main character also doesn’t get any op cheat powers. That the series is completed (and got an incredible ending) is either a pro or a con, depending on your disposition.
Cooking With Wild Game - Similar to Bookworm, this is another isekai story that features a underpowered main character and that is on the surface a lot different than what’s below. On the surface, it’s just some isekai MC cooking food for some woodland tribe. Below the surface, it’s another story about class divides. Also, just like Bookworm the stakes at play are constantly growing bigger. At first, it’s just between different tribes, then between the town and the tribes, then between the town and the nobles, then the duchy vs other duchies, and currently, there are the first signs that the stakes might involve other countries soon. It’s a very slow burn, but all the good characters are more lovable than in any other series.
Those two are locked in. 3rd place, on the other hand, is a bit more fluid. Changes for me depending on my mood. For the moment, let’s go with
The Otome Heroine’s Fight for Survival - another isekai (I know, shocking) story about a woman who gets reincarnated into the body of the heroine of an otome game (think very trope-y visual novel for girls). Technically, that’s not 100% true, but close enough for the sake of this recommendation here. She gets ousted by another reincarnated girl who assumes her position as the game’s heroine and instead starts to fight for herself in the wilderness. Over time, she becomes very overpowered with the help of some eccentric mentors she meets along the way. I love this series, especially for how ruthless MC is. For example, one group tries to kill her, she answers by completely annihilating said group to the point where members in other places start to whisper her name in fear. She’s the John Wick of the light novel world.
Those are my recommendations. You can also brows through the weekly “What have you read…” threads where we give quick impressions of the volumes we’ver read that week. Maybe something jumps out and interests you.