Almost all my MOCs are motorized but I always have felt admiration for the manual ones and in the end play with them is almost the same. Of course that some of them have to be motorized like trial trucks but I think that the machinery for example would be funny to play motorized or not, what do you think?, what are they advantages and disadvantages in your opinion?. I start first, manual ones would be cheaper and easier to scale well so you have a lot of them to choose in the other hand motorized ones are expensive and you have to find machines where you can put all the components respecting its scale which is always a big problem but in the end you are doing something that moves by itself... it is difficult to choose... I would like to start manual MOCs just to not to see more wires anymore...