I've considered the following method, but have yet to test it: All classes roll a base d4 for hit dice, adding a modifier based on class HD as follows: Wiz/Sor 1d4, Bard/Rogue d4+2, Cleric/Druid d4 +4, etc... I suppose it's better for higher-diced characters than average +1/2 die, but might be a decent method. I came to up with this idea after rolling a 1 for hp with my Bar1/Sor4 when taking a 2nd Barbarian level for sorely needed hit points (it made sense anyway, as my 18 str made me the default "tank", so that's where I'd spent most of my time.) I argued with a friend (fellow player, sometimes DM) that it was ridiculous for a barbarian to even have a chance of rolling lower hit points than a wizard. She refused to even consider the idea. This was coming from the player who complained incessantly about having chosen Dex as a high score for her monk instead of Con, to the point that the DM eventually allowed her to switch them. My argument is that if my character isn't likely to survive, why would I even want to play? Mediocrity is not something with which I enjoy spending much of my time, especially not time devoted to fun.