OK, trying to focus on films that I know I saw before I was 16. But that was so long ago...
4. Jason and the Argonauts (I know it's not horror - but it has monsters that blew my little mind)
5. Masque of Red Death
6. The Oblong Box (not the best of films - but images from this really stuck with me)
7. Deathmaster (man, this one did not hold up, but as a child, parts of it freaked me out)
8. Godzilla vs. The Smog Monster (Godzilla was a HUGE part of my childhood and this one gave me nightmares)
9. Horror of Dracula
10. Dracula (1931)
11. Count Dracula (1977) - the one with Louis Jourdan
12. Dracula (1978) - noticing a trend here?
13. Night of the Living Dead - this one somehow became a family tradition on Thanksgiving as soon as we had a VCR
15. Texas Chainsaw Massacre (I may have been 16 on this one - but as a little kid, the radio ads scared me)
17. Them (that damned sound they made)
18. Children of the Damned
19. Beneath the Planet of the Apes - also not horror, but the underground dwellers freaked me out
20. Evil Dead