I'm a set collector and I have my own 'sets' I am curating in themed groups for worldbuilding. I'm more likely to accept trades with pets themed after the following:

• Hallowed Ground/Woods/Cryptid - darker than most halloween themes
• Fae/Fairy
• Garden
• Scenes

Examples/Wishlist of Hallowed Ground/Woods/Cryptid:

• Emaciated Horse - Halloween '11 (VR)
• Gold Pattern Smile Dog - June '12 (VUC)
• Black/Red Pegasus - Valentine's Day '13 (EUC)
• Bloody White Pegasus - Valentine's Day '13 (EUC)
• Nightmare Horse - Slumber Party '13 (EU)
• Black Wisp Chrysalis - Halloween '14 (R)
• Spirit Circle Foal - Halloween '14 (R)
• Candle Wax Red Horse - December '14 (C)
• Phantom of the Opera Horse - December '14 (R)
• Fluffy Horse - Halloween '15 (R)
• Hooded Spirit Horse - Christmas '16 (VUC)
• Rose Snake Horse - March '17 (C)
• Rose Foal - March '17 (VUC)
• Zombie Horse - Halloween '17 (R)
• Red Eyed Horse - Halloween '17 (R)
• Golden Eyed Pegasus - Halloween '17 (R)
• Crow Hamster - Halloween '18 (R)
• Red/White Biblical Angel Dog - September '19 (UC)
• Gargoyle Foal - Halloween '20 (C)
• Crumbling Gargoyle Foal - Halloween '20 (EUC)
• Moth Man Butterfly Wolf - Halloween '22 (VUC)
• Shadow Ritual Circle Fennec Fox - Halloween '22 (EUC)
• Skinless Baby Rat - Halloween '22 (R)
• Red-Eyed Owl - Camping Event '23 (R)

Examples/Wishlist of Fae/Fairy:

• Brown/Gold/Copper Horned Horse - Store Pets '12 (VR)
• Cockatrice Set - Halloween '14 (R)
• Unicorn Set - Store Pets '16 (ER)
• Clover Lion - St. Patrick's Day '16 (UC)
• Blue and Red Albino Dragon Newborn - Easter '16 (R)
• White and Brown Bunny-ear Deer - Easter '16 (R)
• Unique Lineart Shaggy Horned Dog - Space Event '16 (R)
• Clover Horse - St. Patrick's Day '18 (C)
• Woodpecker Chick - August '19 (VUC)
• Longhaired Troll Underbite Dog - Fae Mischief '19 (R)
• Fairy Butterfly Wolf Set - Fae Mischief '19 (UC -> R)
• Red Dragon Newborn - Fae Mischief '19 (R)
• Griffin Newborn - Fae Mischief '19 (R)
• Chimera - Halloween '20 (EUC)
• Unique Lineart Pastel Unicorn - Store Pets '21 (VR)
• Brown Frost Rose Butterfly Wolf - March '21 (UC)
• Green Thorn Rose Butterfly Wolf - March '21 (C)
• Rainbow Cloud Bunny - Easter '21 (EUC)
• Blind Salamander Baby Rat - Cave Event '21 (R)
• Dino Dragon - Cave Event '21 (VUC)
• Fae Kelpie - Store Pets '22 (VR)
• Green/Yellow and White Fennec Fox - February '22 (C)
• Orange/Blue Dragon Newborn - March '22 (VUC)
• Brown Clod Butterfly Wolf - March '22 (VC)
• Snake Set - St. Patrick's Day '22 (OMGSC -> VUC)
• Cherry Blossom Tree Cow Set - Easter '22 (R)
• Easter Basket Braided Horse - Easter '22 (R)
• Frosted Grass Butterfly Wolf - September '22 (VC)
• Lunar Dragon Newborn - Lunar New Year '24 (C)

Examples/Wishlist of Garden:

• Carrot Rat - August '15 (EUC)
• Horizontal Sliced Rat - November '15 (VUC)
• Sprout Hamster - Easter '19 (R)
• Red/White Tulip Butterfly Wolf - Easter '21 (R)
• Lemon Baby Rat - Christmas '21 (UC)
• Chipmunk - Camping Event '23 (VUC)
• Vine Snake Set - April '24 (OMGSC)
• Fox Colored Butterfly Wolf - July '24 (UC)
• Moth Chrysalis - July '24 (C)

Examples/Wishlist of Scenes:

• Pastel Bunny Wood Dog - Store Pets '17 (VR)
• Cream Bunny Wood Dog - Store Pets '17 (VR)