After playing Softcore for a long time I finally took the plunge and tried Hardcore. Only running it one step up from normal difficulty now but I have to say, it's a lot of fun. It almost feels like a new game. When I get into a sticky situation I have this feeling of major panic. It is completely different feeling then playing softcore.
I have a 70 of every class except crusader in softcore and was honestly starting to become a little bored with the game. If anyone is in a rut with the game or looking for a new experience I highly recommend giving hardcore a try. My guy is only 38 but it's been a blast from level 1.
One downside is you have nothing when you start hardcore. It is like you just bought the game. You have no gems, money, paragon levels and all your crafters are reset.
I wish I would have had the balls to do hardcore much earlier in my D3 career. So much fun!