Ok, after this post I have vanish from this thread, I'm mortally afraid of spoilers. Luckily season 4 starts here in Finland too pretty soon - surprisingly soon really.
I don't think there are spoilers below, but be careful anyway, I don't want to ruin anything from anyone.
Anyway, I don't know about other people, but I love lost because it is, without a doubt, the television show with most substance. Granted, there are many things just put there for show, probably. But in the season 4 finale I was thrilled that someone called Minkowski answered the phone. (Nerdy explanation: Hermann Minkowski was a German mathematician after whom a formulation of the spacetime of special relativity is named Minkowski space. I thought this might imply that the island is some sort of a spacetime-anomaly.)
There is also many more things to make you think: Questions relating eg. to philosophy (free will, for example) and religion (Lockes faith) vs. science. Also it's packed with interesting literary references. In Dante's Divine Comedy The Mountain of Purgatory is on an island, the only island, on the southern hemisphere. Sounds kinda familiar... With all the other purgatory references it seems to me that the island of lost is also some sort of a metaphorical purgatory.
But the views above are mine, and so are very possibly false. I use the next line for the second time, apologies for that: I still haven't seen any of the Pirates of the Caribbean movies and thus really don't know Jack.
Simon