Good question< C
Some of the Cons of owning a hedgehog are :
They aren't legal in all states.
They are harder to care for.
They don't do well in cold tempertatures.
They are a fairly new pet, and finding a good vet is a hard thing to do.
They are active at night, and are usually grumpy in the day , so if your not a night person, a hedgehog isn't the best idea.
They have quills, and know how to use them!
They don't do well with other pets
Most dont like to have other friends
They are a REAL joy to have, and are VERY funny
They are easier then some small pets
Not very expensive to feed, or house.
Don't take up too much space(a few 96qt sterilite containers will do for a hog or two!)
They are the best pets, when you work with them,a nd bring them out of their shells.
These are just a few, i'll let others add to the list