I am right handed, so, from an early age that was most comfortable for me. I would do it left handed from time to time, but it was always better right handed. However, over the years that has changed. Now I much prefer my left hand almost always. Maybe it was practice that made it more comfortable? Maybe the ability of typing and pointing and clicking with my right hand has something to do with it as well. Like I am doing now. Lol. Seriously, I have a slight curve to the left and it is most comfortable left handed now. I get a better look at my cock left handed too. Yes I love looking at my cock a lot. So, there you go. Just a few thoughts. Either way I have much experience over the years, but, my left hand gets the most action these days...

I am right-hand dominant so I began jerking with my right. Now, I'm almost exclusively left handed jerking. That came about from internet porn...I use my right to point/click and type...lol! So there you have it.

Left and I am right handed

That's funny I didn't think about freeing up the right hand due to internet porn. Makes sense though!

I've just always used my left hand for as long as I can remember.

Mostly left, but for kicks, I sometimes change.

I'm a rightie as well and switched to using the left when I got my first computer. Now almost exclusively use the left...lol.

I'm right hand but use my left to jack off

It depends on how I feel, when stroking myself. I usually use my right hand, but sometimes, I will use both hands!
Paul

When I was a younger man, I used my right hand. But at one point, I started using my left hand and it was amazing. Now I go back and forth

I've only ever managed a good wank with my right hand.

I love using both of my hands for stroking myself, switching off one hand over the other. Rubbing the palm of my hands up and over my helmet head!
Paul

When I was younger, I used my right hand. Then one day, I switched to my left hand. It was so much better.

I use both left and right. I have gotten it down so well, that I switch hands and gain a stroke!

Right handed here but I use my left hand to jack off. Use my right hand on my friends cocks along with my mouth.

I'm a lefty but I jerk off with my right hand!

Depending on my mood, I usually use my right hand. But, sometimes I use my left hand and other times, I will use both hands!
Paul

I often used both hands as a teen, stacked one on top of the other. Used to be able to lick my own cock too, ah to be young again!

Over the years, I have found Stroking myself with both of my hands. And I have found that using different techniques and types of stroking toys to be an amazing feeling!
Paul