Depends a lot on what the interviewer actually asked and how they directed the conversation, and also on how the candidate responds. If the interviewer is badgering the candidate to try to force a “damning” response, yeah, that interviewer sucks and is engaged in inappropriate behavior. But if the candidate jumps to tell you he likes to play half-naked characters, that’s also a red flag.

If an interviewer specifically asks if you only play female characters and why, that’s pretty weird. If your response is something like “because I like their jiggly titties” instead of something like “because I find them attractive”, well, that’s even weirder and frankly not work appropriate.

But yeah, if the interviewer is pushing you to discuss your favorite characters, you shouldn’t feel the need to hide the fact that you play female characters. That’s your preference so whatever. That’s different from making it overtly sexual.