I cast my vote for Magda, Dr. Hoffman and PT Hoffman. Though, it was tough to narrow it down to 3. Grayson played all her roles with such relish.
My favorite lines from Grayson that come to mind:

(as MAGDA, to the doomed Quentin): "You HAVE no future..."
(as DR. HOFFMAN, in a rattled moment): "You always win, don't you, Barnabas?!"

I agree with the Ghost of Sarah Collins: Anita (Bathia Mapes) was great in the role - blooper or not, and methinks the person who yelled out her line (rather than allow the actors to stumble through it) exercised the impulse due to the actress' advanced age. Ageists on DS... humph!!

Love MB's recollections of THE EDGE OF NIGHT - I watched that one too during the DS years, and its "presented live" telecasts gave it an "edge" (no pun intended) similiar to Dark Shadows. It also had some "spooky" elements (remember the insane woman, Stephanie, who quoted Macbeth, sent spiders and poisoned chocolates to a character named Nicole, and crept around wearing a stocking over her head? Shades of Angelique vs. Josette to be sure). 

Looking forward to the dish from David Henesy.  He mentioned in a phone interview with KLS that he was good buddies with Don Briscoe (albeit he also noted Don's penchant for being in an "altered state" right before his werewolf transformations). Now that Don has passed on, I hope David and other DS actors will break their guarded silence about Briscoe, and offer some thoughtful and fun anecdotes about working with him.
May Henesy also go easier on our beloved Grayson in subsequent recollections. Perhaps now he sees where she may have been coming from with her maternal protectiveness and candor. Wonder if David, a known prankster on the set, ever absconded with Grayson's "Magda" wig, or perhaps he stole her cigarettes (as he'd done with Joan Bennett). I could see her getting irked about that. 

Hang in there, Connie -
nothing unusual about what you're going through.  After a spell of DS-burn-out, one way I get rejuvenated is to initiate a "DS virgin" to the fold (watching a fresh face react to the Barnabas/Julia chemistry is always rewarding). Or better yet, someone who hasn't seen the show since 1970, until a trusty MPI tape is brought forth from my collection. And when they see Don Briscoe and say, "Oh, yeah, I always thought he was sexy..." the fever of this unique show returns for me.
Give it time. We freaks will be here to welcome you back when you're ready.
Love always, Sandor

Jean-Claude North, you stole my projected new avatar! But hey, I can't fault your good taste. Yours or Jennifer's (her Briscoe avatar pic is in glorious color - post more often, Jen!).
For those in search of other rare photos displaying Don's gorgeous face and soulful eyes, run (don't walk) to your nearest used magazine store (or E-Bay) and hunt for the following issues of 16 MAGAZINE:
October 1969 - Feature article on Don at his NYC pad (shirtless poses and a peek inside his mini-refrigerator)
March 1970- Don is named "Sweetheart of the Month"
August 1969- Don graces front AND back covers
June 1969- Don's "Loves & Hates", though he emphasizes he doesn't literally "hate" anything (he simply "dislikes" i.e. "prejudice of any kind")
November 1969- pass the smelling salts to Gothick after he ganders at the back cover - SEXY color pin-up headshot of Don suitable for framing 

Sandor will be wearing black for the remainder of the week.
Sad to hear that my favorite DS player has left us. Always handsome, earnest, and sensitive, Don Briscoe will live on in the hearts of his fans. I'm looking at a candid fan photo from '68, taken outside the DS studios, where Don is playfully biting Grayson Hall's neck. So when Don reached those pearly gates of heaven, I've no doubt Grayson teasingly greeted him in Julia-voice: "Tom Jennings! Noooooo!!!" - whereupon they hugged, and Grayson took his hand, assuring him,  "I'll take care of you, kid. No full moons up here. Just peace."

Gothick, our minds think alike.
I had read somewhere that while the elegant Joan Bennett was still alive and appeared at a DS Convention, a fan had compiled a "Best Scenes of Elizabeth/Judith/Naomi/Flora" videotape for her.
When her characters were front and center in the storyline, Joan seemed at her best. My favorite was when, as Naomi Collins in 1795, she gave Reverend Trask a slap only rivaled by Julia's right hook to Cassandra's cheek during the Dream Curse story.
Yet I yearn to see a "Best of Grayson Hall on DS" compilation, not to mention a "Best of Don Briscoe" - and if consultants were called in on the project, I'd nominate you, Heather, and Julia99 to help handpick the classic moments for Joan, Don, and Grayson: my 3 favorites from the series.