I've excluded duplicate photos (that is, dolls that show up from the same photo session) in this list.

In first place (actually, in the top three spots), it's Peak's Woods suntan Dlight, default face-up. I chose this photo, the most popular with 29 favorites. This doll totally captures my heart!

In second place with 18 favorites, Lady Bee (hybrid Peak's Woods head/Doll Chateau kid body) makes an appearance with Rex, a resin BJD Pet from Eve Studio.

Next, coming in third, it's a limited edition Sir Tin Vampire Fairy Fairy of Fairytales (also by Peak's Woods). I think this photo shows off his makeup very well, but it was a quick deboxing photo taken with my iPhone.

Elf Tristan (also suntan by Peak's Woods) comes in at #4 with 16 favorites. I think she's amazing and definitely deserves more camera time.

In spot #5, it's another photo with 16 favorites, it's the Peak's Woods booth from the April Korean BJD show. I picked up Cosmo and Segi at this convention.

Spot #6 (14 favorites) is taken by the Queen Bee herself. Lavin (Peak's Woods) is modeling a OOAK gown by MegannArt.

A comparison shot between Dlight (left) and Suntan Shaia, both by Peak's Woods, comes in at #7 with 14 favorites.

In 8th place with 12 faves, it's hybrid KoonieS (Peak's Woods/Doll Chateau). This also was an iPhone photo.
The Chicline girls have been the most spoiled dolls of the year. This is Chicline Chloe, in 9th place with 11 favorites. She's dressed in Hot Blooded, an outfit by Integrity Toys (for FR:16 dolls).
Last but not least, Cue (Peak's Woods Fairy of Color) takes up my 10th spot with ten favorites. This doll was sold as a full set.