I think it depends on what kind of rules. I would wager to say that most NTs of any sort don't like being forced to follow external rules, but there are some that like to make and enforce rules upon others.
Um, are you sure you are not a J? I feel like a unicorn dies if I ever have to give a direct order.
And self-indulgent could be a J trait, I don't know. But it sure as hell sounds like me. I think self-indulgence is a big part of the procrastination process for entps, but I hate to speak for all of us. I just know what I'm like. And I am very self-indulgent.
Disregarding rules is not a P/J attribute, I don't think, but a cooperative/utilitarian one. So your friend is most definitely one of the utilitarian types, so an SP or an NT. Your description did strike me as quite P, and probably quite extraverted. That lovely quote about needing to change the pear in order to experience makes me say T. So that leaves us with ESTP or ENTP. I'd hazard to say ENTP, as he seems more like the nutty professor type than the selling ice to eskimos type