Oct questions
 

What is the best octo to keep, and why? Whats the best thing to feed them? Does it have to be live or will they eat frozen? How often do you feed them? Any special lighting needed? Any other special needs besides the normal saltwater setup ?

You really should be able to answer all of these questions by doing the bare minimum amount of research I would presume necessary for someone to keep an octopus.

Best type of octo (subjective) I say caribean reef octopus becuase they will eat frozen food and do not need a chiller. They eat everyday and do have special needs and parameters.