Ladmo, I want to try your mod:
brittonc@earthlink.net
I think the best blood effects are those that are realistic and not too over the top. So far I think the combination of the white puff and a little bit of blood (someone posted how to combine them elsewhere) makes for the best overall effect; however you do not get blood splats on the surrounding walls with that, which would be even nicer.
One thing I think would be REALLY cool, is if you could somehow VARY the effects or amount of blood, so that when you shoot one enemy maybe you only see a little, or even none, but then the next you see more.
That to me would be more realistic than the idea of having NONE of the enemies bleed at all, even after you shoot them five or six times...