Sea salt is just evaporated sea water and, for all practical purposes, is the same as salt. It has a few trace elements in it but nothing much. I've never tried it but heard it has a slightly different taste and some people prefer it. But just remember: salt is salt whether it comes from the sea or not.
Everyone in a modern society ends up addicted to salt. Well, I guess I shouldn't say everyone, but a huge % of us do: it's just in everything. And pretty soon we feel that our food has literally no taste without it.
This is very dangerous, because, like sugar, we need a little and so our taste buds are finely tuned to pick out even small amounts of the stuff. Unfortunately, more tastes even better and so we end up consuming way, way too much.
The good news is that if you give it up for awhile, you'll find that food with added salt begins to taste annoyingly salty. This makes it easier to back off of the big quantities at least.
Salt is very dangerous stuff and I've already written quite a bit about it in these links:http://www.peaktestosterone.com/Salt_Deadly
Did you know that salt assaults your erections directly? Here's a few examples as to how it does it:http://www.peaktestosterone.com/Salt_Erectile_Dysfunction
Hope that helps..