I use both post-bound and 3-ring styles.
One of my favorite finds has been the "Paper Sticker Binder" that is really meant to hold different sizes of stickers. It usually runs about $30, and is the 3-ring style, but the outside zips up. I really like this style to protect my pages. The front covers start to look the same, so I typically use rubons to create a title on the front. I have used this for a few WDW albums and loved it.
I think there are advantages to both, and I agree with what has been posted obout their differences (that post-bound typically looks better than 3-ring for a 2-page spread).