Experience Tumblr like never before
it's totally okay if you can't write for all characters!
I struggled a lot with Lance as well but I was like "meh, I got this request, I'll write it, let's just see what comes out of it". and you can end up loving the character (hehe, me) or hating them even more lol, but then you can at least say you tried!
if you feel like it, you can even make a list of characters you "recommend" people to request stuff from you with, so 1. you can practice writing without the headache ("OH MY GOD WHY DO I HAVE TO WRITE DOWN YOU'RE KISSING WITH MC, I DON'T EVEN LIKE YOU"), 2. your readers get more quality stuff as well!
(also, the "must write" list is a good idea, maybe setting *slight* deadlines can help out with it as well - nothing too serious though, because you might feel like you're "failing" or something if you can't fulfil it, or at least that's what I do lol. but something like "I want to write x headcanons this summer", I think that's doable! I'm trying this myself as well right now hahaha)
I need to do a “must write” list of things that I would like to write just so I can get to them after I someday (at somepoint, whenever, please please brain) finish all the Valentine’s day requests that nobody remembers anymore that I need to finish, but I do, and ppl think now I’m full of shit, just because apparently I’m unable to write anything romantic with Hyun.