I prefer JSON camel cased. The default setup in ASP.net Web Api using the Newtonsoft JsonSerializer is for Pascal Case. To switch to camel case is easy and makes for a much more seamless angularJS and Web Api interaction. In the WebAPiConfig class:

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var jsonFormatter = GlobalConfiguration.Configuration.Formatters.JsonFormatter;
jsonFormatter.SerializerSettings.ContractResolver = new CamelCasePropertyNamesContractResolver();