The questions a little too general to second guess what you are looking for but I will give a quick shot at a list:
1. are the largest of the commonly home aquarium kept species and should be housed in a 65+ gallon tank with sump
2. appear to the be longer lived after entering the tank environment of the warm water species we keep (anecdotally speaking and may have more to do with the limited handling than the octopus species)
3. are crepuscular and some will train to be active in daylight but daylight activity has been very mixed with individuals
4. are a large egged species with benthic young so theoretically it may be able to raise a few that have brooded from a WC female but there has been no TONMO success with this
5. are very likely to be cannibalistic (both same and differening species) as well as aggressive toward tankmates as they grow.
6. are probably the most attractive, graceful looking octopuses of the ones we keep (eye of the beholder perhaps but in spite of looks, these are not my very favorite).