I prefer propane. If it is already in your boat, it is not hard to replace components as apposed to starting from scratch. Alcohol doesn't burn as hot, hence wait longer for things to cook, and it also puts moisture in the air so that you could have water dripping from your headliner, etc.
Back in the days of Kenyon stoves that were pressurized, unexpected flare-ups were common, which often got out of hand and the worst thing to have on a boat is a fire.
The Origo stoves are non pressurized (no unexpected flare-ups) and heat control is done with a gate cover that swings back and forth to expose more flame area, or less, and to shut it off, you cover up the entire hole to cut out the oxygen. Kind of like a Sterno fuel supply with repositioning the lid.
One thing about alcohol is a not so out of control fire can be extinguished with water.
The other thing is to purchase fuel that has no odor. They are spendier, but still won't break the bank.