It's horror movie season in the US and my favorite type is zombies. I also love campy B movies. Watching Dead Snow 2 right now and I think it ranks up there with Shawn of the Dead and Evil Dead 3: Army of Darkness.
One of my favorites, one I feel is hugely underrated, Michael Wadleigh's 1981 Wolfen, which is not about werewolves, but ecological displacement, loss of habitat from urban development (among other issues), and not terrorism --- a conclusion initially drawn by the police --- but territory. With Albert Finney, Diane Venora, Gregory Hines, Edward James Olmos, and Tom Noonan. Its release in theaters was eclipsed by “The Howling” and “An American Werewolf in London”, but Wolfen is not merely a horror movie, but an intelligent one, ahead of its time IMHO. The confrontation atop the Manhattan Bridge between Finney and Olmos (see below, not a spoiler), which still makes my knees weak, involves no stunt doubles. The film also has beautiful dog sequences, imaginative cimenatography, and yes, some gore.