Chaotic Good Dread Necromancer...

[SpikeFightwicky]

They have to prepare themselves to cast a spell that is the opposite of thier nature, but doesn't totally violate their beliefs; they can do spontaneously what comes naturally to them. Channeling positive energy is natural to good clerics, channeling negative energy is natural to evil cleric. It's obviously not a neutral force.

It's not a matter of what they want to spontaneously cast, or what is most beneficial for them to be able spontaneously cast... it's what's closest to their nature.

But inflict X wounds spells are not evil spells, yet they involve channelling negative energy to harm foes. You're saying that a spell, that does not have the [Evil] descriptor, is a neutral spell, despite channelling 'evil' energy. And if (-) energy is evil, why would good deities tolerate its clerics using it? (vice versa for evil clerics and gods)

And how come the negative energy plane is NOT an evil plane? If (-) energy were evil, surely its source would be evil.

As for clerics sponta-casting, it could be interpereted that good clerics favor life (positive) energy, and evil ones favor death (negative) energy (or rather are forced to, since they don't have a choice). A neutral cleric can channel either energy of his choice, but doesn't become evil or good or doing so, he can't choose both because they're opposing forces.