Season 13 turned out to be my most productive Season, ever. Typically, my goal is to complete Chapter I, Chapter II, Chapter III, and Chapter IV. Doing so gives a player a full set and some goodies (such as a special portrait, a pet, and sometimes some wings).
The most attractive thing about Conqueror (at least, for me) is that players who complete it receive extra Stash space. My off-season Stash is very full of items, even after I weeded some of it out. I was extremely motivated to earn some additional Stash space.