Drama/Tragedy
Drama and tragedy anime consist of intensely and passionately spoken lines, usually with emphasis on emotion. In that sense, this genre can be very useful to study extreme ways of speaking Japanese to convey your intent, as more than half of speaking Japanese isn’t so much about what is said, but rather how it’s said and reading between the lines (and some body language).
Be careful though, while drama and tragedy have plenty of stock quotes that seem very handy, you may notice that using them might add too much emphasis to what you’re trying to say, and will end up backfiring when your audience thinks you’re hysteric.