jcrack_corn

I've searched and read, but I just need a quick clarification or Link that i can read! Just moved into a house that the guy did everything "commercial" style (foundation/HVAC/Electrical)...I'm used to single circuits being fed from 1 pole breakers. This house has all circuits being fed from 2 pole breakers (of course I'm not talking about the 240v circuits)....so example...bedroom #2 and #3 are fed from a single 2-pole CB, and I assume at some point (havent dug around the attic) the red branches off to bedroom 2 and black to bedroom 3, neutral shared). All the CBs are also propery "physically" connected so that both poles are de-energized together. To me the disadvantage of doing this is that I have to turn off 2 circuits together (instead of isolating one room/circuit)....i know this is necessary so that the shared neutral is always dead with this setup... However, what is the ADVANTAGE to doing residential wiring this way, the only one I could come up with this that all of the wiring is VERY neat and clean....is there another that i'm missing? THANKS!