CHRIS: Mmmm, but Dr. Hoffman, you really think what you're doing down there... mmmm.... will keep me from going through the transformation tonight? Mmmm, ohhh...

O is for orgasmic = the sensation one seemed to have after being bitten and drained by the vampire (be it Barnabas, Angelique, Tom Jennnings, Megan Todd, Dirk Wilkins, etc.) - i.e., "Julia's facial expressions during her secret meetings in the woods with Tom Jennings were positively orgasmic." 

Sorry to be late with my birthday wishes, Annie. Quentin and I were up all night talking about you. I think he's got a crush on you - but his heart currently belongs to his gramophone and whiskey.

You're the gal who can change all that!! But you already knew that....

xxx
Sandor

E is for evidence: someone on DS was usually either trying to "bury the evidence," "come up with some evidence," or "uncover evidence that the supernatural exists."

F is for foiled schemes (usually Angelique's).

1. Little Sarah's ghost helps Maggie escape the Old House basement, with Barnabas in hot pursuit.
2. Julia's first showdown with Barnabas, when she reveals knowing what he is, but offers to help him.
3. Roger brings his new wife, Cassandra, home to meet the family. The looks on Vicki's, Elizabeth's, and Barnabas' faces say it all.
4. Time's running out for Cassandra, who is made mortal by Nicholas, and reverts to her true age - shortly after attempting to shoot Barnabas.
5. Willie gets Barnabas to admit his rarely spoken feelings for Julia, who's at the mercy of hungry vampire Tom Jennings.
6. Julia gets the hypodermic ready: Joe's reacting badly to having a dead vampire and a live werewolf for cousins.
7. Prof. Stokes performs an exorcism on Collinwood.
8. In 1897, Judith reads Edith's will to her stunned brothers.
9. Amy runs to Chris and Julia after seeing the horrific Leviathan creature at the Antique Shop.
10. Magda (1897) tells Barnabas to bite her, but Barn thinks it wiser they both call a truce and mourn the passing of Sandor.
 

But let's face it - the reason Chris and Tom happen to look identical is because they're played by the same actor. 

...And I say a prayer of thanks to Dan Curtis every night, for bringing Briscoe back into the fold after his short stint as blood-'n'-Julia lusting Tom Jennings.