Would it be possible to separate double-click behavior between the music and video sections?
With music, when I double-click on a file, I want it to play the whole album. (actually, I want it to play everything in the current list view, but that doesn't seem to be an option unless you disable grouping by album)
With videos, unless I have queued up a list of them, I generally don't want it to move onto the next one after playback.
Better yet, finer granularity by being able to create a view where files override your preference and do/don't play back sequentially would be great. For example a TV series with 20 minute episodes, where I might want to watch a few shows in a row.