Edit!! I've made some of these and am planning on making more at some point! Link In character.
If you have more ideas I'd love to hear them, maybe I'll make some.

Some concepts I'm probably going to revisit at some point and make or encourage other people to do if they like the concept enough themselves:

Artfight themed ones:

• Received an attack - Received 5 attacks - Received 10 attacks - Received 25 attacks - Received 50 attacks - Received 100+ attacks
• Featured in a mass attack - Featured in 5 mass attacks - Featured in 10+ mass attacks
• Retired Artfight Character
• For character: One year on artfight - Five years on artfight - Ten years on artfight
• Obtained via Design Me An OC on Artfight
• Created for an Artfight Theme (potentially different ones for each artfight theme?)

• Created to be a love interest but ended up a protagonist - Created to be a love interest but ended up an antagonist
• Made for the creator but gifted to the owner - Made by someone else specifically for the owner - Concept created by owner and drawn to life by someone else
• Has been a PC in at least one ttrpg system - Has been a PC in two different ttrpg systems - Has been a PC in 5+ ttrpg systems
• Has been a PC in one campaign - Has been a PC in two different campaigns - Has been a PC in 5+ campaigns
• A character that helped you realize part of your identity (maybe different ones for gender, sexuality, romanticism)
• Characters in different ships: m/f - f/f - m/m - nb/m - nb/f - nb/nb - poly V - poly triad - poly quad
• SU fan character - Homestuck fan character (and the canon gems/species of those properties)
• For the pokemon fancharacter: trainer character - gen 1-8 pokemon character - pokemon fusion - gijinka
• Character that is royalty
• Character created for escapism (as an opposite to made for venting)