Same here, I watched the first season of Lost within the span of a week and it was a surreal experience... I'd never come across any show, or movie for that matter, than scared me shitless and intrigued me to no avail. But I think its popularity has prompted ABC to change their plans to drag the show on for a lot of seasons, which this show is obviously not suited for, as demonstrated by the noticeable amount of filler.
I still love 24... people complain that it's become formulaic and just repeats previous seasons, and you cannot disagree with that, but so what? Too much of a good thing is a great thing... right?