For all media files (images, sound, videos)
I use the following string as the "View" option
nice -n 19 xterm -sb -maximized -fg lightblue -bg black -hold -e mediainfo
So, with this,
when I do a middle mouse click on a media file,
an xterm window will pop up,
showing the properties of that media file,
according to mediainfo
(name, size, metadata tags, and a lot of other information).
I use this for more than a year, I think,
and I am very pleased,
because it works very fast,
and shows all the "internal" information of a media file,
that a user might need.
Also, having the window pop up maximized,
makes it easy to close it,
without having to search for the X button
allover your screen.
That, too, makes it relatively easy
to drag the left or right edge of the window,
to decrease its width by half,
in order to compare two media files.
The nice command is useful for weaker computers
(like a netbook).
You could consider making this the default for xfe.