Do you know that if you 'ban' a track (part of the 'love' feature), then it will not get used in auto-playlists or Auto-DJ.
For instance I don't like live concerts in auto-lists, so I've 'banned' them all (as well as intros, outros and speaking parts),
which means if I want to play them I need to have manually put them into the Now Playing List.
Additionally you could try this too (which I also use when I want more control without fully banning tracks):
· Create a 'exceptions' static playlist and drag into it all the tracks you don't want in auto-playlists/Auto-DJ.
· Use a rule in your auto-lists: playlist is not 'exceptions'
Or, in the same vein, you could set a custom tag to 'S', 'L' and 'C' (or simply 'D' for 'duplicate'), and use that tag in your playlist rules.
The 'ban' method would achieve more-or-less what you asked for, with the advantage that you wouldn't need to include any
'exclusion' rules in your playlists. Selecting 'ban' tracks would be the same amount of work as tagging duplicates.