I can't say I have a favorite. I have a few for different reasons.
This Coleman tank-top propane burner is the first one, kind of outdated, but still works. I used this in the Marines quite a bit. Not much anymore.
I bought a Primus Omni-fuel Ti for all weather performance and fuel options. But it's big/heavy as stoves go. It can handle a big pot though.
The Primus has two valves, you can really dial in the flame,
I've picked up a couple of isobutane stoves along the way too.
The Olicamp Xcelerator is fairly light, has it's own legs and fairly big pot ability.
Then the smallest I have is the Olicamp Kinetic, it's nice and light at 1.7 oz, tank-topper. Fast to set up when you just want to make coffee or some noodles in a cup, or heat some water real fast for a MH or something like that.
They all have their strengths and weaknesses.