Actually there are six kinds-—
1. Classic ADD - Inattentive, distractible, disorganized. Perhaps hyperactive— can be lethargic even, restless and impulsive.
2. Inattentive ADD - Inattentive, and disorganized.
3. Over-focused ADD - Trouble shifting attention, frequently stuck in loops of negative thoughts, obsessive, excessive worry, inflexible, oppositional and argumentative.
4. Temporal Lobe ADD - Inattentive and irritable, aggressive, dark thoughts, mood instability, very impulsive. May break rules, fight, be defiant, and very disobedient. Poor handwriting and trouble learning are common.
5. Limbic System ADD - Inattentive, chronic low-grade depression, negative, low energy, feelings of hopelessness and worthlessness.
6. Ring of Fire ADD - Inattentive, extremely distractible, angry, irritable, overly sensitive to the environment, hyperverbal, extremely oppositional, possible cyclic moodiness.
Source?