Formal/Neutral:
* Dramatic (straightforward and simple)
* Theatrical (implies an exaggerated or stage-like quality)
* Exaggerated (emphasizes the over-the-top nature)
* Emotional (focuses on the intense feelings displayed)
* Overreactive (highlights their tendency to react strongly)
Informal/Negative:
* Drama queen/king (a common, somewhat derogatory term)
* Overdramatic (emphasizes the excessive nature of their reactions)
* Histrionic (a clinical term suggesting exaggerated emotionality)
* Melodramatic (suggests a tendency towards overly sentimental or emotional displays)
* High-strung (implies nervousness and a tendency to be easily upset)
Humorous/Sarcastic:
* A thespian (implies they're a bit of an actor in their everyday life)
* A scene stealer (suggests they draw attention to themselves)
* A hurricane in a teacup (emphasizes the disproportionate reaction)
* A drama llama (a playful and silly way to describe someone dramatic)
The best word choice will depend on the specific context and the tone you want to convey.