The aluminum is a lot of fun to work with. I probably wouldn't use it to build a stand out of even though I know that's totally possible. I would just worry about deflection so I would end up way overbuilding it. There is deflection calculator software available. Still, I really like a solid tube steel frame.
For other less critical frames like a hood, it's nice. I will be able to adjust the rails on top to best fit the lights I end up with. Then, it's just a thin wood facade for aesthetics that doesn't need to hold any real weight.