Grids?

What grids appear to work most flexibly, most creatively, most productively? In your opinion, why is this so?

The rule of balance and principal of thirds I think create the most flexible and creative grid for productivity. As the lecture pointed a grid will “narrow the "creative options"” By using one of these two principles for layouts creates many opportunities, as it is a limited amount of structure and control. The possibilities are endless. At the same time, while this limited structure will open creativity and flexibility, it is probably not the best choice for productivity. Using a grid with more structure and control will save time and as the lecture also stated, "things are falling together nicely." With a more structured grid, like a nine column grid, the decisions have been made which will ensure a more consistent design.

Resources:
AIO Lecture Week 1
Design School 3rd edition –pgs 17,18,19,140
http://desktoppub.about.com/od/designprinciples/l/aa_balance4.htm