So since this is a "Disney" board, and not alot of people really think about, or go to other parks I think it's good if people have an idea of what they are getting themselves into before going to any Non-Disney parks.
So from this list, you can look at what type of experience you want and then pick the parks that meets that kind of experience:
Highly Themed Family Parks - Not alot of "grown-up thrills"
Disney theme parks
Themed Family Parks - with some "grown-up thrills"
Busch Gardens Africa
Busch Gardens Europe
Family Parks - with moderate "thrills" (not necessarily "themed" but nice natural settings alot of times)
Sea World (Orlando, San Diego, San Antonio)
Bonfante (Gilroy) Gardens
Silver Dollar City
Classic style Amusement parks with good mixes of modern "Thrills", family rides and good old fashioned fun
Santa Cruz Beach Boardwalk
"Thrill" parks that contain a mixture of Thrills and Family attractions for everybody. Don't offer any real 'themed' experience although some rides may have themes.
Knott's Berry Farm
Paramounts Great America
Some Six Flags Parks (Fiesta Texas, Over Georgia, Great Adventure)
"Thrill" parks that are great to just ride coasters, don't offer any real 'theme' and don't have a good mix of family vs. thrill rides
Six Flags Magic Mountain
I know there are other parks that fit into some of these categories, but I don't want to mention those that I haven't been to or don't have any knowledge from.
Those of you who have been to more parks than me, feel free to add more posts to the list.
This way when you are planning your vacations next summer, and you want to include an amusement park or 2 along the way, you will have an idea of what parks will meet the needs of your family.