Never.. I always played d2 on bnet. Since that gave the chracters their value. I have no issues with the 'Online DRM' millions of people bitch about, since i would never make an offline character in the first place.
The skill catagories were mashed together in one the the last patches in closed beta. Sometimes the grouping make sense... Other times they make no sense at all, making it not practical to play with it on. My biggest issue with my DH and having elective mode off is the preperation skill, it makes no sensing being lumped together with any other skill since its functionality is unique. Also, it is grouped togther with Vault,... I can't bring myself to leave town without preperation AND Vault in my build.