I prefer heroines with interesting, well-written personalities. MC doesn't necessarily have to be strong or assertive. What matters is that she has some personality to begin with.
I just can't, even in otome games that are specifically made for self-inserts (like Amnesia, for example). Maybe it's because the heroine doesn't act the way I would, so it creates this sense of dissonance for me.
I prefer to see the heroine as a separate character with her own thoughts...
Hakuoki... pretty naive at times, and some of the routes are very similar to each other. There was too much boring, repetitive text and too little romance.
Cafe Enchanté. I tried to start reading it several times, but... I can't really explain it. It just feels like something is off. Also...
I usually try to read every route because sometimes important parts of the story are revealed in the other routes. But there are a few vn that I just couldn't bring myself to finish. And I kind of feel guilty about that...