Hands down, english lops are now my favorite indoor rabbit breed. In general, for all breeds, I find bucks to be more cuddly and sweet, and does to be tidier with the litter box and more playful/energetic/sassy. Elops are the least active breed I've owned or been around, making them awesome pets and seems to help completely cut out any inappropriate chewing too.
Our buck lives in the bedroom, and sleeps snuggled up in my armpit at night. xD Adults are about ten pounds, and they typically live longer than some of the other large breeds. I adore their personalities...very, very dog like.
Velveteen lops are a mix of Elops and mini rexes, two breeds I really like, but I have not personally spent time with any.
I've met some nasty individuals in generally docile breeds, and sweet individuals in some generally high strung breeds. As others have said, know your breeder and their animals.
. The mini lops around here have been sweet, as have the lionheads, but I've met really nippy ones in both breeds before that I did not care for.
Any breed can be kept outdoors, though some need extra care like the ears on elops. My tamest, most interactive rabbits have been indoor rabbits though. Generally, they are very easy to get to use a litter box, in which case cleaning is very easy. If not using a box though, they have very mineral rich..often reddish, urine, and are great at making a lot of fertilizer. Drop through wire is often used for outdoor rabbits due to this. Trust me when I say a wooden hutch is not fun to clean if not litter box training.
Research rabbit diets. This can be a killer in way too many pet rabbits either through obesity, GI stasis, or other issues. Papaya/pineapple/some other fruits are a good preventative for wool block, especially in a breed like an angora or lionhead.
I really think rabbits are one of the best little pets. I love that an animal generally regarded as being mute can have so much to say with every grunt, brux, flop, and leg shake.Edited by punk-a-doodle - 3/21/12 at 5:35pm