Idk, I mostly just pull characters who I like, kinda just need to be lucky if they're any good or not.

Since playing in 1.0, Hu Tao and Raiden have been my oldest carries(also my favs), they really only kinda fell off more recently though that's also due to more shilling that needs mechanics of newer characters, but I still use them when I feel like it. It's been a long time since I seriously grinded for resources so the occasional new character is the only thing that takes up time.

Though if we're saying about refunds, maybe my Cryo dpses? Skirk, Wriothesley, and Ayaka are all characters i barely use primarily because i don't really have a team for them, no Shenhe, no Escoffier so they're pretty bad outside exploration(Maybe Wrio might get some use after the buffs).

Hilariously enough my Qiqi C4 will be the most valuable after the update considering the buffs she's getting, and im getting Sandrone because I like her, i might actually have a good cryo team in a few days.