If you want to trade characters / designs, here's my preferences:

Key: Like NO 👀 Super Interested

Blank Slates 👀 (characters with no bios / info, allowing new owners to freely use them for anything like personal works and stories)
Cats / Winged Cats
Human Bishōnen / Effeminate / Pretty Boys 👀
Human Bishoujo / Bifauxnen / Pretty Ladies
Monsters / Eldritch Horrors / Man-Made Horrors Beyond My Comprehension 👀
Fakemon 👀 (no gijinkas, fusions, eeveelutions, regional variants or convergent species of existing Pokemon)
Puella Magi Madoka Magica / Magia Record 👀
Japanese themes
Fantasy
Angelic / Demonic
Surreal / Surrealism 👀
Symbolic
Lolita Style (mostly boy style) 👀
Anime
Cute
Unique 👀

Basic info (such as but not limited to sex or species) that isn't allowed to be changed
Closed / Open Species of any kind, MYOs, or vouchers/tickets
Characters or designs that have, come with, or entirely based on kinks / weird fetishes
Character designs heavily based on existing properties / fandoms
Too Many Colors / Rainbows
Too Complex / Too Many Accessories / Details
Elderly/Muscular/Fat characters
Furries / Anthro
Designs made with Bases, Dollmakers, or Generated via AI
Zero interest in the following: Vtubers/Emotes/Fusions/Sonic/SU/MLP/Undertale/Deltarune/Genshin Impact/Hazbin Hotel/Helluva Boss/Warrior Cats/Homestuck/FNAF/Digimon/Reptiles/Insects/Horses/Sparkledogs/Skeletons/Food/Mechas/Robots/Objectheads/stuff labled or based on "-core" aesthetics