Catholics and orthodox what is your favourite saint or virgin? of your devotion?

is there any difference between catholic and orthodox veneration to the saints or the Virgin Mary.. are there virgins like the carmen or perpetual help in the orthodox churches? what is your favourite saint or virgin if you are catholic or orthodox? do you pray a novena or any prayer? could you tell me if you have recieved any miracle from him or her? thanks for answering me well.