Hello,
hey, looks like this is going to become a real great program! At the moment I organize my photos with PicaJet, but they got stuck since two (!) years with the new version 
Looks like this project is updated more frequently?
Well, my feature suggestion would is: It would be absolutly super nice if there was a way to do complex searches. That means: Search pictures that are connected to categories, but exclude certain kind of pictures or only show pictures that are as well in category A as in category B, for example. So you could use AND, OR and NOT as search parameters.
Example: Say you have the categories "Mom", "Dad", "Myself":
-- search "Mom" AND "Dad" AND "Myself" --> only pictures of you and your parents
-- search "Mom" AND "Dad" NOT "Myself" --> Pictures of your parents, but no pictures of your parents and you
-- search "Myself" OR "Mom" AND "Dad" --> Pictures showing either you or your Mom, but in any case of your Dad
...and so on.
Also it would be useful to have the parameter OTHER_CATEGORIES:
-- search "Mom" NOT OTHER_CATEGORIES --> Pictures that only show your Mom (e.g. those images of your Mom that have no connection to other categories). This way you could filter out all images within a cateory that are also connected to other categories.
What do you think of this?
Best regards, Ruceb