for me it was characters forced into crossdressing that start to enjoy crossdressing.
i only realised i hated it later because my brain translated the being forced to act like another gender / dress like another gender as the trans experience and seeing those characters start to like acting / dressing in the gender they were forced to be pissed me off.
to clarify i LOVE characters that crossdress of their own free will!!! they slay and are amazing and i adore them with all my heart.