For the future Harry (I'm probably going to look at it again), let me tell to myself that I'm a mediocre developer.

That being said on to the code:

I didn't notice that my own main view was passing the item. So here it goes:

Simplified partial View:

@inherits Umbraco.Web.Mvc.UmbracoViewPage<MyModuleModel>
@using MyProject.Models;

@{
//this will give the nested content title with a custom model.
var title = MyModuleModel.Title
}

Then the Model which is custom and uses route hijacking:

using Umbraco.Core.Models;
using Umbraco.Web;
using Umbraco.Web.Models;

namespace MyProject.Models
{
    public class MyModuleModel : RenderModel
    {

public CurtainsModuleModel(IPublishedContent content, IPublishedContent item) : base(content)
        {
            //the model is the actual page (outside the nested content
            //the 'item' here is the nested content item that comes from the main 
            //view loop.
            Title = item.GetPropertyValue<string>("title");
            Summary = item.GetPropertyValue<string>("description");
        }

        public string Summary { get; set; }

        public string Title { get; set; }
    }
}

The main view has a loop that renders all the nested content doctypes. Each doctype has a partial of the same name:

//each item is a nested content doctype that has a partial of the same name
    @foreach (var item in Model.GetPropertyValue<IEnumerable<IPublishedContent>>("generalContentCollection"))
        {
            var partialViewName = "_" + item.DocumentTypeAlias;

                Html.RenderPartial("_myModule", new MyModuleModel(Model, item));
            }
            else
            {
                @Html.Partial(partialViewName, item);
            }
        }