I wish there were more natural/"accidental" ways of gaining corruption. As far as I'm aware, the main ways to gain corruption currently are either choosing post-combat sex with demons/corrupt beings, consuming corrupt transformatives, or choosing the rare "evil" option in dialogue, all of which are pretty "intentional" ways to gain corruption. As it stands, it's hard to roleplay a pure character who slowly becomes corrupt over time, because for example why would a normal pure champion choose to have sex with demons in the first place?
So I think it would be good if there were more events/random encounters/etc which give corruption to an unwitting champion, e.g. a random encounter event like the "pick flower/berry/etc" ones but instead of gaining an item it turns out to be a corrupt flower that sprays you with a bit of aphrodisiac which also adds a small amount of corruption (or maybe make it also give an actual item and thus you would be willingly choosing to expose yourself to it to farm it, which is a more "innocent" way of gaining corruption, and maybe even add a quest giver who requests you to farm it to make it more immersive, and include an option somewhere to take precautions to avoid the corruption gain for people who want to stay pure).
As it stands, I just sit on 0 corruption forever because it doesn't make sense for my character to go from "heroically helping out a stranger in the tutorial battle against evil cultists" to "having sex with demons for no reason".