I saw the first episode of Mad Men when it originally aired and wasn't that impressed. It looked pretty and had a decent cast but it just felt a little flat. I kept hearing good things about the show, though, and finally decided to give it another shot. I just finished watching season one and am now a huge fan. This show is unique and has incredible, layered characters that grow on you each episode.
I do still think that the first few episodes move a little slowly but it's worth hanging in there. The story pace quickly picks up and you will soon find yourself deeply in love with these Mad Men and the equally Mad Women who are their counterparts. Now I can't wait for the second season!