You could call them a party animal. The life and soul of the party opposed to a party pooper.
You call a person who likes animals animal advocate, animal lover, etc.
a person who likes word games
GEEK
a panhandler!!!!
Hypochondriac
Abusive
party animal
There is no special name for a person who likes squirrels.
a very intelligent person.
Party Pooper
Hermit
A snuggler