Support for sorting by 'Date Taken' in the SE "view options>sort mode" would be great.

It would be excellent for date sorting accuracy for use with Image files that have the embedded 'date taken' information contained within the image file.

QuickPic has this same feature in it's gallery app.

I think this can be best implemented into SE by simply adding a tap+hold function onto the existing 'Date' sort option. So a user could tap+hold on 'Date' to be presented with two options of: Date Taken and Date Modified