The best decade for horror films, is not on the selection list.
Nothing beats the decade of Boris Karloff and Bela Lugosi for classic horror films.
The 30's

No not yet. Love Vincent Price, but haven't yet seen that one.

This. Out of the poll options, '70s, but the competition is fierce.

Going by how I classify horror, I guess I'd say the 90s, followed by the 70s.

can't say for sure since i haven't covered all decades enough. But i've always felt that the sort of grainy/vhs element that some of those 70s era films (ex: TCM) have adds something unique them

i completely agree. That's why I'm kinda picky when it comes to buying older horror films. Do I really want to get a crystal clear blu ray of Romero's original NotLD?

Naw. Even watching remastered versions on TV these days puts me off because I can see how fake everything is.

That's entirely up to you but I do, I think. Watching older horror films and low-budget horror films in high definition or in better PQ than a VHS or a crappy rip opens up a new level of appreciation in those films. When you can see ultraclearly where the artifice lies, it adds a certain charm to the horror imo and more than anything it in involves you in the creative process. This is also why I really like watching the really crappy stuff, horror movies by Edgar Ulmer, Jess Franco, Luigi Cozzi and other slightly more sophisticated gore auteurs such as Lucio Fulci and Lamberto Bava*. The horror and gore elements are totally and utterly fake but they interest me because they teach me stuff about the building blocks of horror, gore and why it is that these films have such an effect on me. Horror films don't ever really scare me anyway (although some do), so I personally don't have to worry about "not being scared" because of high definition imagery. What it does offer me, is to see how well some of these often looked down upon movies are actually shot (bluray quality really accents all colours, cuts and camera moves) and exactly how much love and care is poured into them.

*for the record, I prefer Dario Argento and Mario Bava, but you see why mentioned the former and not the latter

get what you're saying which is why I'm still picky, but Night of the Living Dead is a particular case where I want to see it in the shittiest version possible. I think the movie is a better experience in lower qualities. It's like a VHS placebo effect that adds to the eeriness by acting as a "found footage" type deal.

Excluding Halloween as a prime example is just wrong. Also Silence of the Lambs really isn't a horror film.

I would take Halloween over The Exorcist any day.

I would have to say the 80's, but it's not really all that far from the others, all decades have had class Horror movies