With a complex mxd involving many points, lines, and polygons, which package type is most appropriate?

In the context of working with a complex MXD (Map Document) that includes a variety of geographic data such as points, lines, and polygons, the most suitable package type is a map package. A map package encapsulates not only the map document itself but also includes all the associated data, data sources, and layer symbology, which is crucial for ensuring that the map appears as intended when shared or opened on another system.

Using a map package allows for comprehensive sharing of the entire project, making it easier for others to access and work with the full array of elements present in the complex MXD. This is especially important when there are multiple data types which need consistent representation and symbology across different environments or platforms.

In contrast, the other package types serve different purposes. For instance, a tile package specifically addresses tiled map layers for performance in web applications, a feature package would focus on sharing raw feature data without necessarily preserving the map's visual context or symbology, and a layer package is more limited, focusing only on individual layers rather than the entire map with its context. Hence, for a multi-faceted map project, a map package is both comprehensive and effective.