Do you like blood, gore, and violence? Do you like hot women? Do you like high-power rifles? If you are male, the answer to all three of these is probably yes. But, even if you're a girl, and you answered yes to any of these, I have a great anime for you.
Highschool of the Dead shows one likely way the zombie apocalypse will go down. Naturally, the whole world changes. Women have to fight for their lives. So, the smart ones, the ones with an once of sense (and typically HUGE breasts and glasses) slit their skirts, grab some guns, or whatever other weapon they can fight, and fight alongside the men (most of whom have nosebleeds by this point).
Now, the animation style on this is really nice, detailed without being gritty, and smooth where it counts. Although it does play up the fanservice (at once point four women are all bathing together and feeling each other up) it also has a lot of real intense fight scenes, and the group dynamics of the characters are amazing. Also, they do manage to maintain a plot. Its hilarious even in a testosterone filled way.