You can do research and the safety features are priority. In the 300 mpg car, the picture, would that car be safe for drivers in a car crash? In that size, it's small room you can get badly injured or get killed in an instant in a crash. You could total that car very easily. Keep in mind, safety is another issue buyers want to know about.
For a hybrid, I'd choose Pirus. Unless there is new hybrid vehicles in the market with higher MPG, I'd not mind.
There's few cars that runs on Hydrogen today, so there isn't much hydrogen station that can do refuel. When there is more and more hydrogen vehicles on the road, and more stations, I'd not mind getting one.
Electric cars, you can't go much far away on a charge. It's good for local driving errands.