I like these Pierre.
Noise - at the moment its possible to use Pattern Overlay and generate patterns to put grain texture and noise into layers. But a layer style with the correct parameters, grain size, blur, intensity, saturation (Saturation applies to the saturation of the noise not the image), would be useful.
This brings me back to feature request made about a year or so ago, that it woud be possible to sample overall image 'noise'or 'grain' and to apply this to areas. It would use image analysis tecniques, although Im not sure yet what these would be - to create an 'average' grain structure for the existing image (probably the base layer but this could be redefined). This would mean that any bad retouching (blurring or image softening) could be more easily salvaged, and would also mean that its easy to do much more destructive editing, more freely on an image than before, without the worry of banding on output.
If I think of any others I'll post them
I agree as well, your suggestions are something I would utilize quite often.
I would like to see layer styles that abide to the layer's mask.
If I have a an object on a layer that has an outer glow of pink, and that layer is masked, the layer style will always wrap around the object where it is clipped by the layer mask.
I want the style to obey the layer mask as well.
Feeddaneed - that option already exists, although you probably don't know about it, because its easy to miss.
If you double click to the right of the layer name, this opens the Blending Options dialog. In the first screen, under Advanced Blending you will see a checkbox which says 'Layer Mask Hides Effects'. Toggle this.