I feel like picking a favorite of all time is extremely hard but personally Re:BIRTHDAY SONG (by honeybee) has everything that I want from an otome game. It's rather old though.
Without wanting to spoiler anything, Its a fantasy story about death and the afterlife. We have a school setting and...
I think they all are fine honestly. What I can't stand though are MCs who cant speak up when necessary or keep thinking the right thing but never putting it in words. And for some reason I find myself liking the knight type of MC the most aka the ones with a strong sense of justice.
I feel like games with a fully fleshed out common route often have rushed character storylines. That said, thats why some games get sequels probably. I believe 50/50 would be the best for me personally.
It highly depends on the game. I feel like the better the game the more willing you are to play all routes as you want to understand the full story. Nowadays I find myself being satisfied with just playing the routes that interest me. The worst though is when you dont actually like the game that...
Almost never actually. In fact its actually worse when they try to intentionally make MC as vague as possible so that anyone can somewhat see themselves in her. I feel like the amount of Otome games that do that have increased as we rarely even get a voice for MC nowadays.
There used to be a time where the opening/ending would sound awful vocal vise and that would really throw me off. I feel like nowadays thats rarely the case. Other than that the BGM is rarely annoying. Sometimes its very repeating, then I turn it off x)