It depends on what plans you have regarding your holiday.
Are you planning to go far?
Then we recommend to hire a gasoline car. It is easier to use, especially when you go to remote places. You can also use an electric car, but make sure you plan this well by drive by charging points. Here you can find all gasoline cars.
Do you take a lot of luggage with you?
Go for a station wagen like a Opel Astra Tourer (gasoline) or a SUV like a Hyundai Kona (electric). Here you can find all cars with a lot of cargo space.