I have a few notable favourites, which are much easier to find now that I started tracking what I read this year for the first time. Here are my top ones so far (mostly series):
1. Special Circumstances (2 books) - John Ringo
This series is about a deeply religious housewife who also battles monsters. Lots of interesting religious discussion between epic battles.
2. Dr Charlotte Stone (4 books) - Karen Robards
A great series about a psychiatrist who hunts serial killers, with the help of ghosts.
3. Wicked, Ugly, Bad (4 books) - Cassandra Gannon
A hilarious set of loose fairytale retellings. I had to take breaks often because I was cry-laughing too hard to read. Like I almost peed myself laughing on many occasions.
4. Abhorsen (5 books) - Garth Nix
A dark fantasy series about a family of necromancers and their allies trying to protect the world from being overrun by all sorts of nasties. I could not put these books down.
5. Mistborn (6 books) - Brandon Sanderson
The first three are an amazing epic fantasy trilogy, and then the author decided to suddenly turn it into a steampunk western for the rest. It shouldn't work, but somehow it just DOES, and so well.
6. The Others (7 books) - Anne Bishop
A gritty urban fantasy series where humans live alongside various supernatural societies. Lots of politics and plotting, and horrible bad guys getting their comeuppance.
7. I, Robot (lots of books, but I only read this one) - Isaac Asimov
This was so, so good. It was so interesting reading science fiction with highly advanced technology, like AI and interstellar space travel, yet computers don't exist.
8. Buyology - Martin Lindstrom
A fascinating and terrifying look into the world of neuro-marketing. I learned so much about the subtle things companies do that don't even register as marketing, yet are highly effective.
Right now I'm working my way through Patricia Briggs' Mercy Thompson series, an 18 book urban fantasy series focused on werewolves and vampires, and having a great time with that. Also Agatha Christie's 45 book Hercule Poirot series, though that's going to take awhile with the number of library holds on them.
Also, on the opposite end of the spectrum I have a new book that wins the spot of "Dumbest Shit I've Ever Read in my Life": The Kraken's Heart by Annie Rider. It showed up as a Goodreads recommendation (fuck if I know why), was short, on Kindle Unlimited, and I was curious. So there's that.