These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Magnificent Bastard: Larry. Essentially engineers his and Anna's reconciliation, as well as Alice and Dan breaking up for good by blackmailing Anna into sex—he bluntly admits that he did this for the sole purpose of fucking with Dan—and later telling Dan that he slept with Alice as well. Sure enough, Dan reacts exactly as Larry predicted—he can't deal with either revelation and his relationships with both women end. Larry gets his wife back, Alice moves on with her life, and Dan is left alone and dejected.
The album by Joy Division:
Tear Jerker: Pretty much the entire album, but especially the last four songs, which are some of the bleakest musical recordings in history.