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.
Taken to the extreme in the 2012 movie, where Barnabas is now the protagonist.
Germans Love David Hasselhoff: The show had a huge following in Mexico, and, due to its tendency to create completely new settings every few months, is sometimes acknowledged as an influence in the development of the telenovela.
Screwed by the Network / Too Good to Last: The 1991 remake. It actually started off well. But the Gulf War at the time interrupted its timeslot which messed with it's rating. NBC eventually gave it the ax much to viewers dismay. Even a mass letter campaign and a picket protest (yes, really) didn't convince the network to put it back on the air.
The Woobie: Although he's not completely innocent, the suffering Willie Loomis goes through after releasing Barnabas from his coffin is well out of proportion with the severity of his misdeeds, and it's hard not to feel sympathy for the guy. The movie House Of Dark Shadows seems to realize this and majorly Throw the Dog a Bone. Even though Willie dies at the end, he finally is able to do the right thing he always wanted to do and be Maggie's hero when he helps save her from Barnabas.
Plus, the guy got shot five times, ended up in a coma, and was wrongly accused of being Maggie's kidnapper. In one episode.
Awesome Music: Danny Elfman's score, plus many great 70s anthems.
Cry for the Devil: One may feel sympathy towards Angelique - sure, her actions have been downright evil and she's a Manipulative Bastard, but she's also been repeatedly rejected by Barnabas and according to him, she "cannot love."
Darkness-Induced Audience Apathy: Angelique may be an evil bitch but Barnabas, although he's comedic and trying to help his family, is a murderer several times over
Director Displacement: Some of the advertising claims it's "From the mind of Tim Burton", despite the film actually being based on a cult-classic soap-opera.
On another note, some people really didn't find Barnabas killing all those hippies after just having befriended them to be all that funny. To elaborate, Barnabas finally seems to have found some people who are actually nice to him, in their own weird way, understand his problems, and who are very supportive of the way he feels. Even Barnabas himself seems genuinely happy to have finally found a place where he truly fits in. Then he just turns around and simply states he has to kill all of them (which he does so quite brutally from what we hear).
Strangled by the Red String: The film's first two acts focus on Barnabas adjusting to the modern era and rebuilding the family empire while dealing with Angelique, but come the third act he and Victoria are declaring their love and embracing despite sharing all of three or four scenes beforehand.