i think feeback is import to leave,
i always leave feedback when any item arrives, to let the seller no that i am happy with the item and that the item has arrived safely.
seems not all sellers leave feedback, i am still waiting for feedback from 9 seperate sellers, for 12 items i have won. it wouldnt stop me from buying from the seller again, as all the items i am very happy with, and the service was good, so i am happy to leave feedback for the sellers so if they have any potential buyers, they will see from my feedback that the seller was a good one