I find the tagging function for images in xF terrible! Unless you can develop a face recognition like face book it would be far more efficient to go for a Instagram approach where user just click the point of the image they want to apply the tag to. I thin the current tagging function looks great in a tutorial or demonstration, as it looks like there would be some face recognition. But is to cumbersome to use. Such a simplified tagging method would also work great if there was a larger thumbnail on upload. It would also work great to implement on a thumbnail view of albums and categories. I also think it would make sense to put a menu icon for this function where the "set avatar" button is now. and move the "set avatar" to the dropdown menu.