I'm wondering: Do you use the agenda more as a query interface or as your
main view?

I tend to use the agenda for its powerful search capabilities, and either
use follow mode and or enter to get more hierarchical context of the task
(since I tend to follow GTD, and there's always a project/sub-projects with
actions (TODO), so an item by itself might not have all the necessary
information about it (what project does it belong to, for example). But I
never use it as my "main view".

In fact, it would be nice if we could have an agenda view that showed
items hierarchically (like follow mode, but in the agenda listing itself,
perhaps with the levels configurable). I might play around with it and see
if I can come up with something :)

Cheers,

- Marcelo.