By no means an exhaustive list.
  1. 1.
    Liv goes undercover
    Bonus points to the episode where she's a madame wearing a mink. Most favorite.
  2. 2.
    He said-she said, no resolution
    One of these is literally called "Doubt." Least favorite.
  3. 3.
    Elliot takes off his shirt
    Extra special when he's also not wearing pants or when combined with #1. Most favorite.
  4. 4.
    Elliot has rage
    The tiny trees in the diorama his dad smashed! 😭 A lot of overlap with #3. Most favorite.
  5. 5.
    When they can't make the case
    Rare, but always unfortunate. I am watching TV for catharsis, not reality. Least favorite.
  6. 6.
    Finn sticks up for his gay son
    I'm not acknowledging the times when he isn't cool with it. Most favorite.
  7. 7.
    Cragen gets in trouble
    He reminds me a lot of my dad 😕 Least favorite.
  8. 8.
    Munch is left in charge for the next episode
    Only thing that is not sad about Cragen being in trouble. Most favorite.
  9. 9.
    Related to the Colombian gangster who tries to kill Alex
    But she's ok and she's going into witness protection and then she comes back to testify against him and her lover in witness protection whispers Emily into her ear oh man. Most favorite.
  10. 10.
    Ones that involve Ludacris
    His character is sketchy as fuck and he gets everybody in trouble, including Cragen. Least favorite (though that is a sick jacket, Luda).
  11. 11.
    BD Wong saves the day
    Ugh, such a role model. Would never know about ibogaine without him. Most favorite.
  12. 12.
    Dani Beck as a supposedly valid character
    Lol at her whackadoo accent and her couch on fire. Least favorite.
  13. 13.
    Extra-super topical
    Plus-minus. Depends on the story.
  14. 14.
    Involving Elliot's children acting a fool
    You know, driving drunk or being anorexic or having a dead druggy friend. Though one time that did get us a picture of Elliot as a carrot. Still. Least favorite. **NOTE: This does not include the episode where Olivia helps deliver Kathy's baby. That one's the best.
  15. 15.
    Sneaky guest stars before they were famous that you only now recognize
    Lookin at you, cast of Grey's Anatomy. Most favorite.
  16. 16.
    Big name guest stars to draw an audience
    This led to the best episode ever, where Ice-T gets to interrogate his wife and at the end, everybody goes to Red Lobster. Most favorite.
  17. 17.
    Sonya Paxton's reign of terror
    Never redeemed after slapping Elliot, as hard as they tried. Least favorite.
  18. 18.
    Extra punny ones
    Tbh, that's kind of all of them. Most favorite.
  19. 19.
    Liv and Elliot are wildly out of their depth
    These are always ridiculous, often involve threats to national security or hilarious sudden promotions to federal agents or flying to other countries. Most favorite.
  20. 20.
    Post-Stabler, post-Munch, post-Cragen
    Not even dignifying this with a rationale. Least favorite.
  21. 21.
    The type I'm on!
    Suggested by   @videodrew