I owned a bassboat for 15 years with a dual console. Protection from the elements for your passenger, and a safe, handy glovebox for keys, wallet, gloves, sunglasses etc. I now own a single console 17ft Lund and really miss that glovebox, and my passengers keep reminding me of how windy it is, even at 40 mph. Anything smaller than 18ft and I don't think you have enough room for that second console. Personally I don't care for the full windshields, I feel they really cut down on the space to move around, especially when 2 anglers are getting up at the same time
It's all a matter of personal choice, of course. If you mainly fish alone, then don't bother...if you have kids, they definately need protection. Good luck with whatever choice you make.