(other than plot contrivance). Or is it just the 'bad boy' syndrome? Looking back, it's not a very edifying list:
the 'Mr Rochester' holonovel guy
All creeps in my book. Apologies if missed anyone. With that list, not surprised fanfics/shippers looked elsewhere. Couldn't they have given her one decent relationship, even if it was an 'indian summer'? Kirk, Picard and Archer all got one (Paradise Syndrome/Inner Light/Twilight).