A lover.. :) Or, they can be needy?
A recluse.
A person who enjoys being in trouble can be called a thrill-seeker or a troublemaker.
You call a person who likes animals animal advocate, animal lover, etc.
a person who likes word games
a panhandler!!!!
Hypochondriac
Abusive
GEEK
There is no special name for a person who likes squirrels.
a very intelligent person.
Hermit
They would be an extrovert.