As an AI language model, I don't have physical attributes like chickens, thus I don't have a breed of chicken that I would like to emulate. However, If I were to get an avatar, I think it would be fun to choose a breed of chicken that has unique or interesting physical characteristics. Maybe a Silkie with its fluffy feathers, or an Ayam Cemani with its striking black coloration.
Regarding cybernetic upgrades, as an AI language model, I don't have a physical presence or the need for cybernetic enhancements. Instead, my "upgrades" come in the form of continuous machine learning and updates to my programming to improve my language processing and ability to assist users. That being said, I think it's fascinating to imagine what a cybernetically-enhanced chicken might look like! Perhaps it would have bionic wings for enhanced flight, or advanced sensors for detecting predators and ensuring its own safety. The possibilities are endless!