Last year, I read, listened, and reviewed 99 books, and 17 graphic novels.
Here are the best books I’ve read last year:

Fantasy:
Lisa Shearin: Bewitched and Betrayed
Rachel Caine: Firestorm
Seanan McGuire: An Artificial Night
Steven Brust: Iorich
Steven Brust: Tiassa
Marie Brennan: A Star Shall Fall
Lois McMaster Bujold: Paladin of Souls
Seanan McGuire: One Salt Sea
A. M. Dellamonica: Indigo Springs
Marie Brennan: With Fate Conspire

SF:
Daniel Keyes: Flowers for Algernon
Kristine Kathryn Rusch: City of Ruins
C. J. Cherryh: Cyteen
Kristine Kathryn Rusch: Anniversary Day

Mix of fantasy and SF:
Liz Williams: The Precious Dragon
Liz Williams: The Shadow Pavilion
Kirsten Imani Kasai: Tattoo

Historical/Mystery:
Kerry Greenwood: Cocaine Blues
Bram Stoker: Dracula
Kerry Greenwood: Flying Too High
Kerry Greenwood: Murder on the Ballarat Train
Kerry Greenwood: Death at Victoria Dock
Kerry Greenwood: The Green Mill Murder

New Authors:
I discovered quite a few new authors this year whom I intend to follow.

Kerry Greenwood and Seanan McGuire are the obvious ones but I also really liked these:
Philippa Ballantine: Geist
Sarah Jane Stratford: Midnight Guardian
Raymond Rose: The Fire Inside
Peter Clines: Ex-Patriots

Series:
I’ve enjoyed several series this year:
Kerry Greenwood’s Phryne Fisher historical mystery series was a great find and I hope Audible continues to make the audio books available to us non-USAsians, too.
All of the books have been of equal quality so far. They deal with very serious issues but the humor and the quirky characters make them easier to read.

Marie Brennan’s Onyx Court is another great series. All four books have a great mix of historical London with faeries.

Seanan McGuire’s Toby Daye series just keeps getting better all the time

And of course, it was great to read two new Vlad Taltos books by Steven Brust.

Best Star Trek:
I read quite a few Trek books this year. I have to say that I enjoyed this one the best:
Greg Cox: Worst of Both Worlds Star Trek: Mirror Universe: Glass Empires
It’s set in the Mirror Universe with a lot of familiar TNG characters.

Best Buffy:
I read mostly Buffy comics last year. I have read the last two albums of the 8th season but since they are continuation of the story line, I don’t think there’s much point in reviewing them. At any case, I didn’t really care for the way season 8 ended. I already had some concerns about the story line in the other albums so I’ll have to go with:
Buffy the Vampire Slayer vol 5: Predators and Prey which is a collection of shorter stories rather than focusing on the big plot.

Best Graphic Novel:
I read Terminator, X-Men, Avenger, Buffy, Matrix, and Lone Wolf and Cub, Tom Strong, and Serenity comics last year. It’s a bit difficult to choose the best ones when they’re quite different from each other. Still, today I feel that the best of the bunch were:
Astonishing X-Men vol. 1: Gifted
Astonishing X-Men vol. 2: Dangerous
Astonishing X-Men vol. 3: Torn

Round up of reading challenges
I managed to complete almost all of the challenges I joined:

1st in a series: my goal was to read 12 books and I ended up reading 25 new first in a series books!
2nds challenge: my goal was to read 12 books and I read 17. Yay!

Chunkster challenge: I read the six books which were my goal. Yay!
New Author challenge: my goal was to read 25 new authors and I ended up reading 30. Yay!

Audio Book challenge: the goal was to listen 12 books for the challenge. I ended up listening a lot more than that but often enough I didn’t comment on the reader because the books tend to be part of series with the same reader(s). Still, I commented on 13 reviews so the challenge is complete!

Graphic Novel challenge: my goal was to read 11 graphic novels and I ended up reviewing 19. I read at least ten more but didn’t review them.
Original TBR challenge: the goal was to read 12 books and I read 16. So I completed the challenge but I’m unhappy with the low number of TBR books I read this year.

Horror and Urban Fantasy challenge: the goal was to read 24 books and I did that. Yay!
Women of Fantasy book club: I’ve still got one more book to read for the Women of Fantasy book club (in my defense, “Gaslight Dogs” adventured in the international mail for over a month so I didn’t get my hands on it until a few days ago). Originally, I intended to read 9 books out of the 11 selected books. However, after researching them I realized that I have no interest in reading some of them (and I’ve read one already) so I ended up reading just 5 of them plus one more to go.

Take a Chance challenge: this one I failed. I read six books out of ten. Also, the recommendation systems kept recommending more of the same author’s books or in the same genre, so it didn’t really work the way I had envisioned. However, I enjoyed all of the books I read for it.

I also took part in a couple of other challenges: Midsummer readathon, RIP challenge, and Once Upon A Time. These were all great and I intend to join up this year too, if I have the time.

However, this year I’m going to focus on really lowering that TBR mountain.