By adult I mean over 18-20 years of age and with adult appearances. Nothing against anime with younger characters, but interested in finding some with older characters.
supposed to be hundreds or even thousands of years old and that somehow magically makes it not weird or creepy to view this character sexually
And what do you think about irl people who are in their late 20s or 30s and look like teenagers?
That is an actual person that is in their 20s or 30s, regardless of being blessed with youthful looks. Not a fictional character that is purposely designed to look like a child for no good reason other than getting lolicon fans interested.
Is it ok to have preference for blondes or redheads or tall or slim? I think most people will agree it’s ok. Now, do you consider it ok to have preference (including sexual attraction) for youthful looks, in case it’s limited to people who are actually adult?
Actual, real adults? People capable of consent and making their own choices? Absolutely. Doesn’t change my opinion on fictional characters that are made to look like children when making them look older has absolutely no effect on the story.