Cats can be aloof and independent, which some people find off-putting.
Cats can be unpredictable and may scratch or bite without warning.
Cats can be noisy, especially when they meow loudly or scratch at doors.
Cats can be messy, shedding fur and leaving litter boxes that need to be cleaned.
Cats can cause allergies in some people, making it difficult to be around them.
Cats can be territorial and may mark their territory by spraying urine.
Cats can be destructive, scratching furniture or knocking over objects.
Cats can be demanding, wanting attention and affection on their own terms.
Cats can be difficult to train, making it hard to correct bad behavior.