I voted equal, since my dominant hand was injured and I lost all/most of the dexterous muscles. I can still use my dominant hand for most things, but fine motor skills aren't very good neither is touch feedback. I'll drop small things like keys and pencils all the time since I can't really feel them and forget that they are in my hand.
Generally in the car the pipe will be operated by the left (non dominant) hand, and lounging by the right/both.
I mostly use my left as my lighter is decidedly right handed but I switch back and fourth a bit but then again tamp with my right as I am right handed. Strangely if I'm playing an audiobook or music on my phone I'll be doing it with my left hand but if I have a phone call I'm right eared.
Clearly I ran away from my juggling family in the circus.