Of course H1 (1978). I was hooked since then
I don’t remember which one . I wanna say it was either H78 or H20… I do remember shortly after seeing H20 I watched H8
I could only imagine the feeling of watching it at the Drive-In for the first time. 
No wonder it left an impression on you!
HALLOWEEN 1978, WHEN I WAS NINE YEARS OLD @ MY FRIENDS BDAY PARTY, GOT ME HOOKED W/ THE ERIE MUSIC AND RIGHT WHEN HE WAS STANDING @ THE BUSH WATCHING ANNIE AND LAURIE, I FELL IN LOVE RIGHT THERE AND THEN. 
The Original in theaters in 78, I was 7 then. and pureterror, love the avatar… Kiss Rules#1… Dean
John Carpenter’s Halloween. The mask scared me for many years when I was younger now it is my latest obsession.
Was a very big night for me. I watched H1,H2, and the original elm street back to back at a friends sleep over. Had nightmares for days. Ah good times.
I was 13 and it was H2, that’s why I didn’t understand the beginning.
Now I remember! It was Halloween II! I got it for my birthday one year and I fell in love
Halloween (1978). As with many of you it had a lasting impression on me!! 
it was H3 for me which is a great movie in my opinion but if some of you dont consider that part of the series because of no michael … the first film i seen with michael in it was H4 & H5 they made me fall inlove with the series very soon after that i watched H1 H2 & H6 then ofcourse i seen H20 & H8 & RZ H1&H2 in theaters i also went to a special screening and seen H4 & H5 in theaters and another screening to see H1 and then i got to see the original H1 on the big screen because i was a VIP at 30 years of terror it was amazing by original i mean the same film that was showed in 78 it had cracks, pops and lines in it but it was still awesome
Halloween '78, I was only about 6 or 7 years old when I saw it! 
HalloweenTown. . . WAS STUCK EVER SINCE
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the 78 one the best of all of them in my opinion
i got dropped off my dad back at my house when i was 9 and since my mom was out, my uncle and his 2 daughters were gonna watch me. i walked in, and they were watching the original Halloween in my basement. I saw the very ewnd when Loomis shoots him, then we all watched H20, and was instantly hooked when I saw that mask. It was on either FX or AMC.