I could never get the hang of DarkTable, and instead use rawtherapee.
Mostly I like rawtherapee because it can be pointed at a directory of .CR2/raw files, be used to filter them, convert them, and makes zero attempts to be an image-manager. I don't want to import my images into a collection, or tag them, etc. Instead I use a filesystem hierarchy for that purpose:
Images/2015/
Images/2015/10/
Images/2015/10/15-Helsinki-Sunset
Each of my "event" directories contains RAW, JPG, and thumbs. That in combination with the year/mon/day-title directories lets me find things very easily.