I'm 5'9" and rarely wish I was shorter. I generally feel more secure, especially when traveling or by myself downtown - it has been my experience that shorter women tend to be more of a target for harassment (although I am still very cautious about personal security). A few extra pounds don't show up as easily as on shorter women.
Downsides are I'm right at a height where long pants are too long and regulars are often too short. But off the rack clothes rarely fit right on anyone, so it isn't that big of a deal.
Physically, I do prefer bigger, taller men... but my husband is the same height as I am and about 10 lbs lighter. In my fantasies I love the big burly dudes though (and I dated plenty of them... but my husband is a much better life partner and the height thing isn't an issue in the real world).