I love the original and am very fond of Season of the Witch. Part 2 is tolerable on an October evening, but the rest of the franchise can rot for all I care.
I haven’t watched any of them in years, but I remember when I was 10 or so and I first saw 1-3 I loved the first two and hated Season of the Witch. I thought it was stupid. Guess I need to go back and rewatch all three this fall because I don’t remember them all that well anymore.