I just acquired a mini-lop, an American Tan, and a pair of Netherland Dwarf, and I've been observing them. The mini-lop sleeps all the time. The Dwarfs barely sleep, and are so fast, I have to be careful handling them or they will try to jump out of my arms. The Mini-lop is so laid back compared to the Netherland Dwarfs- to the point where I was beginning to worry there was something wrong with her, but I don't think there is she is just very mellow and lazy. The Mini-lop would be a good pet for a kid, but not the Netherland Dwarfs—they are just too fast and jumpy (but I do like them a lot they make me laugh because they are so small and feisty). Of the rabbits I have, The American Tan I got is actually my favorite of the breeds so far, she isn't as mellow as the mini-lop, but is very tame, and she is more entertaining, she frolics in her cage and plays a lot compared to the mini-lop so she is fun to watch—she also seems the smartest, like she recognizes me and is happy to see me. Also I'd like to add, I put the female Netherland dwarf and mini-lop together for 2 seconds and the Netherland dwarf attacked her- the Netherland Dwarf is only half the size of the Mini-Lop and the poor mini-lop was just trying to get away. So Yep, Netherland dwarfs- seem really feisty- and it's too bad because they are so small they could be kept in a cage in a child's bedroom easily- but they are difficult too handle.