Nibbles are grooming.
Rabbits are hard work, they require a lot more space than petstore cages (most breeds are too big to even stand up on their haunches in them), and they can get pretty smelly since they have scent glands near their tails. They're also somewhat more reserved, being a "prey" animal.
HOWEVER, They can be litter trained, and a lot of them are capable of being affectionate with people, that depends mostly on how they're raised.
I have a large New Zealand white buck, a New Zealand and Silver Fox cross doe, a Polish doe, and a Lionhead buck. My personal favorites are the larger breeds (the New Zealands reach about 10-12 lbs), they're -generally- (not always) calmer than the smaller breeds.