My Patronus would probably a seprent because I like the way they move around. Or possibly a Chimera(or griffin) because they are big and strong
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Now I sound like a fangirl...
Pottermore sorted me into Slytherin and that's where I like to be
Patronus... I guess it would be some kind of cat. I can be very nice and cuddly, but if you annoy me I'll attack. They are very nosy, at the same time intelligent enough to run away if necessary.
No, they're not my favourite animal, but I can identify with their personalities.