I'm a darktable guy myself. I have tried Rawtherapee and was even an exclusive user of Art (RT fork) for a while, but darktable has everything I need in one package.
I’ve only just discovered Darktable, so I was a bit reticent to call it one of my favourites, but for the relatively minimal editing I actually do, it does seem to be pretty ideal.
I only use Digikam for organisational stuff really - do you find that Darktable’s filing/cataloguing ability is good enough that you only use the one program?