I'd been reading comics for a long time before that, but I was more of a Spider-Man fan. My dad loved Spider-Man and kind of passed it on to me. I started losing interest in Spider-Man in the post-Clone Saga era, between Steve Skroce's run and JMS' start--basically, the era of so-so Spider-Man ongoings, Chapter One, and various other f***-ups with the Spider-Man line. I was getting more and more interested in the Avengers, meanwhile, and on their side of the fence, Heroes Reborn: The Return had just concluded, the new Avengers, Captain America, and Iron Man series were all knocking it out of the park, and then, a few months after I'd comfortably settled into really enjoying the Avengers stuff while kinda/sorta still being into Spider-Man (mostly for John Romita, Jr.'s art), BAM: The launch of Dan Jurgens and John Romita, Jr.'s new Thor ongoing series, featuring the very first Thor #1 issue in history (since the numbering on the original series continued from Journey Into Mystery's).
I got it because of its shiny cover, JR Jr.'s art, and the collectible status (I was young and stupid), but then I actually read it and found the story pretty awesome. Thor's going about his business when the Destroyer literally drops out of the sky on the docks and straight-up murders Thor after a pitched battle, the Avengers themselves powerless to stop him. Then I read the next issue and saw this interesting, enigmatic figure called Marnot grant Thor a second chance at life, provided he bind himself to Jake Olson, a paramedic he'd carelessly allowed to die in the crossfire of his battle with the Destroyer. Then Namor showed up in #3 to battle a giant sea monster with Thor. Then increasing craziness in every issue after that, juxtaposed neatly with the paradoxically trivial yet absolutely important element of Thor trying to hold the pieces of Jake Olson's everyday life together. I was hooked pretty quickly. Granted, I'd read some Thor comics here and there, and I was exposed to him in Avengers comics, but he was kind of a face in the crowd. He never got much focus in Avengers because he had his own series, so I was drawn more to the lower-tier Avengers like the Vision and Hawkeye. But Jurgens' run really stuck with me, probably because it had such a strong start with these crazy-ass threats. Spider-Man's over here dealing with mob bosses and guys on gliders for six issues; Thor's knocking out dragons and sea monsters and sentient suits of armor every other issue. The sense of scale, I guess, really drew me in.
Even so, I kind of got bored of Jurgens' run in a couple years. I think I might've even dropped it from my subscriptions; there's a chunk of Jurgens' run, from somewhere in the 30s to the early 40s, where I know I never read those issues. But then I saw something about Odin having died, and I was like, "Whaaaaat?" So I got back into Jurgens' run right at the start of the King Thor Saga, and that satisfied an itch I didn't realize at the time but recognize I had in retrospect for real, lasting change. I mean, Thor became king and shifted his whole world around--Loki was an ally, Balder a traitor, the Enchantress his friggin' wife. Again, the scale of it was beyond anything going on in comics at the time. It was also surprisingly complex, what with the Church of Thor and that adversarial priest bringing questions about the nature of faith and worship and how the world would really react if myths suddenly walked among us, etc. More than all of that, though, it was just really good.
So yeah, after Jurgens had thoroughly hooked me, then I started going back and revisiting some of those Thor comics I'd read in passing before with a new appreciation, until ultimately I decided to read every Thor comic ever. I'm like 80% done with that now and my love for the character has only grown. Pretty sure it's gonna be a lifelong sort of deal.
tl;dr version: Jurgens' run is the first time I actually read Thor consistently and got a true appreciation for the character; then I went back and read a lot of other Thor stuff.