Pizza

because it's the most convenient?

Yep, I have the karu which does gas and wood and I haven't used wood at all since I got the gas adapter.

Wood is just a massive faff, someone has to manage it all the time and takes ages to cool down and clean up when you've finished. With gas you just bang it on forget about it for half an hour until its up to temp so you can just crack ongettimg everything ready.