Fun dives vs established rules?!?
Let me tell you this, I am not a big fan of established rules and on one side it is good that not everybody think like me and on the other side it helps me put my point across!
As you may have realised, if you follow the scuba diving industry news, that sidemount scuba diving is becoming very popular. More than a trend who is called to fade out in time, I think it is a way of life or should I say, a way of diving.
Couple of PADI courses are out there already and whoever tries it claim it is a revelation. More fun, more practical, easier to get to, as doubles are not as available as would be a pair of singles and also offers real redundancy.