Have Transformers ever truly been alien?

As the subject title asks, have TFs ever been truly alien? What I mean by that is when have TF characters ever been portrayed as alien beings with respect to their psychology? When we get down to it, the majority of TF characters have been written as basically anthropomorphic machines in both appearance and mentality.
This topic is partly inspired by my recent re-reading of The Last Stand of The Wreckers where the characters were all portrayed as very human in their mannerisms. I know part of it was intentional but it seemed like I was reading about humans dressed up in robot costumes rather than about alien beings who were mechanical in nature.
Also, the recent news of Transformers: Prime involving the advertising that the show will involve "more human drama than ever" kicked up some apprehension from some of our board members but it seems like they are opposed to the presence of human characters and drama involving them rather than humanistic drama from robot characters.
Now I understand that if the characters are too alien in their personalities, it would be difficult for viewers to relate to the protagonists on some level but at the same time it just feels kind of cheesy when we're told by the story that these are giant alien robots yet they display many human qualities.
This topic is partly inspired by my recent re-reading of The Last Stand of The Wreckers where the characters were all portrayed as very human in their mannerisms. I know part of it was intentional but it seemed like I was reading about humans dressed up in robot costumes rather than about alien beings who were mechanical in nature.
Also, the recent news of Transformers: Prime involving the advertising that the show will involve "more human drama than ever" kicked up some apprehension from some of our board members but it seems like they are opposed to the presence of human characters and drama involving them rather than humanistic drama from robot characters.
Now I understand that if the characters are too alien in their personalities, it would be difficult for viewers to relate to the protagonists on some level but at the same time it just feels kind of cheesy when we're told by the story that these are giant alien robots yet they display many human qualities.