Why do you dislike Tifa and like Aerith? Why do I dislike Aerith and like Tifa? Because they're very different. People who like a character like Tifa dont typically like a character like Aerith, particularily with Aerith's rude treatment to Tifa (yes I know, she's 'holy', but I found her treatment of Tifa with the flirtation with Cloud to be downright cruel).

As for her 'breasts' being demeaning... why do her breasts have to come into play at all? What does that have to do with her character? I found her brimming with personality. She was kind, shy, and optimistic. She did her best to try and challenge Cloud's false memories without straight-out telling him he was wrong and possibly destroying his fragile psyche.

I dislike Aerith very much, but I dont hate her with a passion. The passionate hate usually roots from one thing: Cloud. Most supporters of the girls want their girl to be with Cloud, and that causes heads to butt.