Can my enums have friendly names?

No, but you can use the DescriptionAttribute to accomplish what you're looking for.

You could use the Description attribute, as Yuriy suggested. The following extension method makes it easy to get the description for a given value of the enum:

public static string GetDescription(this Enum value)
{
    Type type = value.GetType();
    string name = Enum.GetName(type, value);
    if (name != null)
    {
        FieldInfo field = type.GetField(name);
        if (field != null)
        {
            DescriptionAttribute attr = 
                   Attribute.GetCustomAttribute(field, 
                     typeof(DescriptionAttribute)) as DescriptionAttribute;
            if (attr != null)
            {
                return attr.Description;
            }
        }
    }
    return null;
}

You can use it like this:

public enum MyEnum
{
    [Description("Description for Foo")]
    Foo,
    [Description("Description for Bar")]
    Bar
}

MyEnum x = MyEnum.Foo;
string description = x.GetDescription();

Enum value names must follow the same naming rules as all identifiers in C#, therefore only first name is correct.

If you have the following enum:

public enum MyEnum {
    First,
    Second,
    Third
}

You can declare Extension Methods for MyEnum (like you can for any other type). I just whipped this up:

namespace Extension {
    public static class ExtensionMethods {
        public static string EnumValue(this MyEnum e) {
            switch (e) {
                case MyEnum.First:
                    return "First Friendly Value";
                case MyEnum.Second:
                    return "Second Friendly Value";
                case MyEnum.Third:
                    return "Third Friendly Value";
            }
            return "Horrible Failure!!";
        }
    }
}

With this Extension Method, the following is now legal:

Console.WriteLine(MyEnum.First.EnumValue());

Hope this helps!!