susceptible to strong emotion.

intensity - by julie pflanzer

intense [in-tens]

-adjective

1. existing or occurring in a high or extreme degree: intense heat.

2. acute, strong, or vehement, as sensations, feelings, or emotions: intense anger.

3. of an extreme kind; very great, as in strength, keenness, severity, or the like: an intense gale.

4. having a characteristic quality in a high degree: the intense sunlight as blinding.

5. strenuous or earnest, as activity, exertion, diligence, or thought: an intense life.

6. exhibiting a high degree of some quality or action.

7. having or showing great strength, strong feeling, or tension, as a person, the face, or language.

8. susceptible to strong emotion; emotional: an intense person.

9. (of colour) very deep: intense red.