My buzz started in college (about 13 years ago) when I was doing Nursing... I had to take an 'elective', a random subject. None of them really grabbed my attention, but I optedfor photography. My dad lent me his old heavy Practika (Praktica?) which had no light metering due to a drop. I had to learn everything manually. I got into B&W film shots, did all sorts during the course, still life, self portrait, studio lighting, some model work and our own assignments. I remember being on top of a mountain outside Ebbw Vale where someone had dumped some electronics (TV's mostly) so we got a model who was a bit of a goth and it looked really cool - shame I can't find the negatives....
After that, I got the buzz. Did more film shooting for years until I got my D40 about 18 months ago, which really helped me to learn more about exposure and I was able to be a bit more experimental without having to wait for developing the film.
I intend to keep my fix, and maybe, maybe one day, sell some prints!
Keep going, you'll always learn something, find something new to shoot. Chances are, you know you've got a real buzz when you see something neat and you haven't got your camera - the first thing you think is 'Dang! I wish I had my camera for that!'
Rich
BTW - I never did become a nurse - I ended up in retail for ten years and now I'm a Web Developer...