Nikon portraits artistic taste or limitations

I've had two particular eureka moments first when I bought my first prime lens and went wow what a difference and the second when I bought an old fuji s3 and went wow what a difference. The big difference is one led me to buy better and faster glass of which I am happy with the second leaves me wondering where from here. I have been looking to upgrade to the d600 but fear it will be in reality little or no better for portraits then my d300. I wonder in looking at the portraits and wedding pics here and some beautiful ones at that if the skin tones and colors I am seeing both from myself and others here is not the result of artistic taste but the tendency of the nikon to produce flat and somewhat off color skin tones. If you think I'm wrong maybe I am or maybe it's just a matter of taste but I know I would love (pie in the sky) a nikon body with a sensor that produces more like the fuji s3 or 5 in skin tones. Do you have a work around (setting preset) that helps you get the skin tones you really like?