I prefer cable operated because it's more control. The problem I have with technology involved with something artistic is it dillutes artistic involvement. Even if it's a variable speed motor, it's still limiting the artistic process, even if just slightly, and limitations and art go together like oil and water.
This is also why I hesitate to say "digital puppetry". It's not really puppetry, but for the sake of someone understanding what it involves, yeah ok, I guess the name is the most accurate but it doesn't sit right with me. Similarly, CGI is definately not animation in my opinion, but I digress.
The amount of times I've seen a medium sized radio controlled puppet and thought "you could fit an arm in there and move the head with a hand..". Same with big animals or creatures not moving around. They should be man powered. Motors are either too jerky or too rigid and spottable from a mile away.
I can understand the use of servo operated puppetry for something like a mask on a costume that is going to be walking around. That's fair enough and the only reasonable way of doing it when both arms of the person in the suit have to move, but most of the time it just seems to be lazy thinking.
I think it was Underworld's use for the faces of the werewolves being cable operated, but the servos moving them were located in the upper back, along with the battery packs. That's thinking outside the box and a clever way of reducing weight in the head for better performance.
You took the words right out my mouth. That's exactly what I was trying say and that EXACTLY how I feel. Thank you!
I also don't like radio controlled puppets that might to use one's puppetry skills, because at the same time, I feel the way you do, "they could've just done..."
however, while the battery pack in a walk around puppet is clever, I do feel that character could easily be a hand puppet and then use full body for wide shots when the character is running or walking. however, if someone felt that movement and talking should be combined then there are ways around that by using mechancial puppetry. They could either:
1. put a strap or a bar attached to the mouth by cables, so when the performer talks the mouth starts to move.
2. put a performer in the suit and have cables run through the back and out to a little controller so when the puppeteer moves the control, the cables move the mouth. Then the cables could be hidden on camera or just edited out afterwards, just like how in Muppet Treasure Island, where they removed the arm rods digitally.
However, there's still the question of getting the eyes of a walk around character to move. Most would say, they should be radio controlled. however, you could just do the same things I mentioned abovem particurally the second opinion.
When there's a will, there's a way.