I would choose the classical metal gate and with auto/remote opening as that suits the style of house I live in. I think if I lived in a town, city or main road/busy location I would perfer the privacy enhancing fully boarded gates. They are all great designs but I suppose it depends on personal taste and the design of your home to which style is gong to enhance your property.
Privacy looks the best based on these images but the final choice will largely depend on what style of property (built, size, exterior finish etc.) you are planning on putting the gate in front of.
V I Metal Ltd
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GreenlinesDesign Ltd
Westcountry Wood