My favorite brand is Cartier. "Inside" this brand, the best model for me is, as you can well understand by my nick, Santos (XL or 100), followed by Pasha, Roadster and Tank Francaise.
A second brand I love to see on woman wrist is Rolex, always in full metal and big size "configuration": Daytona, Submariner, Explorer, Datejust.
The third place on my podium is occupied by Breitling.
If possible, I prefer to see these watches as full metal, stainless steel, big size, a little bit loose on the wrist (the right wrist if possible).