S'funny, I spent many years as a "Brin back the ridged heads" guy, but these days I'm mostly a dome-boy.
I still love the ridged Aliens, but the dome is just such a great point of focus on the Alien...this gigantic, biomechanical monstrosity with a smooth, sleek dome. It's just so out of place that it belongs. Whereas the ridged head is more the kind of thing movie monsters usually have all the time.
Does that make any sense?