I use a canister (Primus Classic) or alcool stove (tuna can). Had both on my last trip and I don't think I'll bring the canister stove anymore except for short 4-5 day trips.

Both are small and light. There are lighter canister stoves than the Primus Classic. It's easy to light and it simmers well. Canisters can be a bit hard to find and that's why I'll keep it for short trips. Most canister stoves can't be used with a regular windscreen.

The alcool stove is ridiculously light, easy to make, easy to light up, is quiet and alcool isn't too hard to find. It cost me a few cheap paper punches and a beefier leather punch. The can costs "nothing" since I eat the content (I use 85g tuna cans, not cat food). With a windscreen, it's surprisingly fast to bring water to boil. It doesn't simmer at all and I've learned to live with it. Some people make alcool stoves with a "simmer ring".

I also have a MSR Dragonfly with 2 broken pumps. I was brought up and I swore by white gas stoves until I used the Dragonfly. It's heavy, expensive, hard to pack, embarassingly noisy, not very stable (wires are slippery and pot can fall in the middle, something you don't expect), and after two broken pumps, I figured I'd try something else. It's powerful and simmers well and I might fix/change the pump for winter camping. I met a guy who got his empty fuel bottles taken away by airport security. Around here, I'd say fuel is a little easier to find than canisters and perhaps a little harder to find than alcool but a litre of naphta lasts than a litre of alcool.