I would be sad if things like potions were actually a core part of Diablo. Here was I always thinking it was killing stuff like a lawnmower and getting some loot on the side.
And stat points. I had mixed feelings about that until I realised that they were pretty much pre-assigned in Diablo 2 anyway. Of course, Diablo 2 did at least give you the freedom to make bad decisions there. But never fear! There are still plenty more places you can make bad decisions in Diablo 3!