These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
YMMV: Princess Lover
Base Breaker: Charolette. Being a Harem series, a lot of folk dislike her for making the harem completely lopsided in her favor; taking up a good portion of the screen-time with Teppei while Sylvie, Yuu and Seika remained mostly Out of Focus. Being the only girl to have a Story Arc involving her didn't help. Of course, there are those who like Charolette's character and want her to end up with Teppei anyway.
Sylvie, who becomes the exclusive heroine for the OVAs.
The two bumbling idiot Mooks who accompany Charolette throughout the hotel and train episodes are fan favorites as well.
Rape Is Love - Somewhat: the OVA shows Teppei being rather forceful in taking Sylvie's chastity, though his excuse is so they can consummate their Arranged Marriage. Sylvie's very resistant at first, going so far as to call him "feral".
The Scrappy: Haltman. His whole motivation to destroy the Arima Foundation was because he was humiliated in front of a bunch of rich folk for getting caught trying to pickpocket the head of Arima in his childhood. Barely anyone was impressed.