Rerolling Hit Points

[Victim]

I give players the option to roll or take 1/2 the die plus 1. Maybe I should swith to 3/4s, though, because that would work better with high HD classes.

I hate rolling for HP because it's the only class feature based on chance. Even though 1d12 HD is one of the big features of the barbarian, there's only a chance, not a guarantee that he'll have more HP than the wizard.

Since I use lots of classed enemies, things are pretty even.

 

[hong]

I do not like hit point reroll systems that give out a lot more hitpoints, because that skews the CR system a bit

I don't think so. At low levels, the difference in absolute terms isn't big enough to affect results that much. A 3rd level fighter with 25 hp isn't that much tougher than one with 20 hp. At high levels, it almost doesn't matter how many hit points you have: brute monsters can blow through it all in a couple of rounds of full attacks, and magic (disintegrate, finger of death, etc) can bypass hit points altogether.

If anything, more hit points can lead to a false sense of security on the part of PCs, so they take risks they otherwise wouldn't. If you're a fan of the "damn the torpedoes" approach, this is a good thing; if you'd prefer the PCs to out-think the opposition, it isn't.