My health never dropped down below 75%, even when I tried to put myself in the middle of the fray. I think I used a healing potion once.
I found, maybe, two or three pieces of valuable usable loot throughout the entire beta. Other than that, all of the best stuff was made through crafting. After a while I stopped caring when enemies dropped loot since I knew it would probably be useless.
Sad to say it, but the classic Diablo flavor was really diluted for me. I honestly think shameless rip off Torchlight was more entertaining ...and that's coming from a huge Diablo fan.