@laconicif I plan to use #digiKam when I go over to Linux, from Photoshop Elements. I have actually already started to use digiKam on a non-daily Linux driver. Face tag feature is important reason for me. I do not know anything about #PhotoStructure. #Shotwell does not have face tag feature, therefore it will not be my choice.
@laconicif Your'e welcome. I recommend you subscribe to the #digiKam mailing list support (see DK website). Also developers are active to answer questions. It also help to understand the sw just by browsing the mails. You can also search the mail list archive. I may also use Rapid photo downloader, RawTherapee and eventually also DarkTable instead/in addition. I'm in an early stage...!
Was leaning toward digikam as it seems to have the fullest feature set