I even thought the same (too much Horror) but usually I don't separate into genres and if - the two most natural and important human emotions are melancholy and - fear. For example, every Hitchcock-Film is pure drama - and most of them are considered as thrillers usually. So part of the "horror films" listed are bizarre and surrealistic - "Vampire Circus" and "Hausu" among others - and the rest are films I like because of their tragedy and headstrong verbalised thoughts - not because I just want to be scared or entertained (this is the duty of the trashy stuff ). 

"Shivers" is listed on my "Must-see-List" since two years but as it's sort of banned (there are two different kinds of ban practised here) in Germany, the DVD is hard to find for a nice price. Hope I will get the chance to buy "Rabid" and "The Brood" (also banned...) soon.