I have a Handy brand tailgate, steel, powder coated black. It's very heavy duty, and heavy. The stock tailgate (2nd gen) weighs 50 lbs, the Handy weighs 40 lbs. I only wear it for 5th wheeling, so its sturdiness is overkill. Being a weight-conscience 3/4-tonner, I would prefer a lighter weight aluminum or plastic gate.
I also had to fab up a set of tailgate cables. On my truck, the cables are left and right, not equal length.
The thing I love about mine is, when backing under the pin, if I clear by about an inch, the trailer is at the right height for the hitch. I used to try to measure with a tape until I figured this out.
Neil