Lazy Loading vs Eager Loading

I believe that grouping relationships in this way is beneficial.

using eager loading when

1. With the principal entity in "one side" of one-to-many relations, which are undoubtedly employed everywhere. like an article's User property. Product's Category attribute.
2. Generally When there aren't too many relations, eager loading is a smart idea to cut down on server demand.

using slow loading when

1. the majority of the "collection sides" of one-to-many interactions. like User Articles or Category Products
2. You are fully aware that you won't need a property right away.

Like Transcendent mentioned, lethargic loading may cause a disposal issue.