I quite like a melodramatic style but it has to be deliberate.

Accidental melodrama tends to come from characters having a disproportionate reaction to something (and not because it was because that character was eccentric or had a mental illness), stating their emotions very literally ("I've had enough of you! You've really done it this time") or in a clumsy metaphor. Basically, emotional writing but without actually portraying the emotion. If you read back your sad scene and it just makes you laugh or shrug, it's probably melodramatic.