I think the type of awning you have/buy depends on the type of camping you do. When we were younger, we would go on 1-2 week camping trips at one destination where we boated. We put out the manual awning and it stayed out for 2 weeks. We had two kids and a 27' Fleetwood Jamboree. We really only used the RV for eating and sleeping. Most of teh time, everyone was outside....under the awning.
Now that we're older and typically only stay 1-4 days at a particular place, it's much easier to power out the awning while using it and putting it away when done. If I had to open and close a manual awning all the time, I probably wouldn't use it.