If you could have any animal as a pet, what would you choose?

If you could pick any animal in the known universe to keep as a pet, what would you want?

Miniature T-Rex? Pygmy elephant? Housebroken pony? Teacup giraffe? (Please note: miniatures and teacups would not have the typical health problems.)

Whatever you want, no limits.

I’d like to have some sort of exotic cat, like a lion, leopard, panther, etc… but one that behaves more like a gentle house cat.