I don't know about you but a slow Zombie just seems more unnerving. Let me explain, With fast zombies, you can always tell that it is still somewhat human because of the fluid, natural movements of running. Slow Zombies have an awkward pace about them, something truly alien, unfamiliar. You see one moving and you truly feel like you've seen something far more sinister, unrelenting, inhuman, and evil.
Plus slow zombies more often than not in fiction are created through dark magics which are far deadlier than any virus. Think of Liches, essentially Zombies with a brain, a Zombie that can harm you with magics but also have age and time and patience to go along with the advantages of the undead. Viruses can be cured, can be contained, controlled, while these magics once cast are as unstoppable as time itself.
And God do I need a hobby!
Plus slow zombies more often than not in fiction are created through dark magics which are far deadlier than any virus. Think of Liches, essentially Zombies with a brain, a Zombie that can harm you with magics but also have age and time and patience to go along with the advantages of the undead. Viruses can be cured, can be contained, controlled, while these magics once cast are as unstoppable as time itself.
And God do I need a hobby!