I had a thought earlier this week (dangerous, I know, and I don't know how original): "What if a modern educational psychologist was let loose on the characters of 
Winnie-the-Pooh by A. A. Milne? They would all be diagnosed with various disorders." Think about it:
| Pooh | 
|  | 
| Symptoms: Likes honey - perhaps a bit too much. Disorder: Obesity.
 
 
 | 
| Tigger | 
|  | 
| Symptoms: Bounces around a lot. Disorder: Attention deficit hyperactivity disorder (ADHD).
 
 
 | 
| Owl | 
|  | 
| Symptoms: Can't spell properly. Disorder: Dyslexia.
 
 
 | 
| Eeyore | 
|  | 
| Symptoms: He's sad and gloomy much of the time. Disorder: Clinical depression.
 
 
 | 
| Roo | 
|  | 
| Symptoms: He's a bit thick. Disorder: Learning disability / emotional problems.
 
 
 | 
| Kanga | 
|  | 
| Symptoms: She's a fussy and worried mother. Disorder: Obsessive-compulsive disorder / over-protective single mother.
 
 
 | 
| Piglet | 
|  | 
| Symptoms: She gets a bit worried and panicked sometimes. Disorder: Social anxiety disorder / panic attacks.
 
 
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| Christopher Robin | 
|  | 
| Symptoms: He talks to his stuffed toys. Disorder: Schizophrenia.
 
 
 | 
Other characters I haven't figured out yet:
| Rabbit | 
|  | 
| Rabbit's friends and relations | 
|  |