I won't go into too much detail because I doubt anybody reads it anyway. I know I don't :)
The Fog, overall, I didn't mind. There were a few lame scares to make you jump, but the overall story was decent.
My only problem was a problem I usually have: motivation. Why would the "ghosts" throw people in a net and dunk them underwater, just to make sure it's extra scary when they're found? And why would one of them walk upside down along a ceiling, leaving scary wet foot prints *insert eerie music*? It's those kinds of things that ruin a suspense/horror movie for me.
I can just imagine the writer going, "ooh! Let's put wet footprints on the ceiling! That'll be scary!!" "Uhh, why would a ghost walk upside down?" "Because it's SCARY!"
But other than cheap stuff like that, I enjoyed it.