I'm actually watching this film for the first time right now. I am finally getting a chance to see this. To be honest the movie is pretty good but fairly dated I do like the 90's version better. In the 90's version Barbara is an actual character for more than just the first 15 minutes of the film.
Actor motivation for 1968's Barbara: you like small things, stare at the music boxes and lace while you wait for zombies to eat you.
Of interest with the 1990 version (also the first official remake) is that Tom Savini directed the movie, and let someone else in charge of the effects.
The creatures looked a little better, and also like they died in the middle of everyday activities in some case, something that wasn't so apparent in the original save for a few shots like the bug eating ghoul played by Marilyn Eastman, aka Helen Cooper.
However, the gunshots in the remake were all canned (and not the real sounds) and the movie, for the most part, had little or no gore and very few headshots.
And be prepared for a real kicker of an ending, from Ben in the cellar to the very end of the film. It's not the old NOTLD for sure..