I don't typically use a lot of filters, noise, or effects, but textures.... TEXTURES are my jam! I fell in love with impressionist paintings back in college, and I have never been the same since, lol.
I end up using a lot of digital brushes that mimic traditional paint brushes, particularly with lots of bristle textures.
Especially with backgrounds. I kinda just go NUTS with the brush strokes, and I don't always sketch the BG elements, leaving most of it to let myself freely paint. XD
For this panel, I used a speckly brush to add subtle freckles and skin texture. But usually I don't go into as much detail. I really wanted this panel to pop.
In regards to lighting effects, I pretty much rely on luminosity/dodge layers to push the image to its final stage of completion. I'm a simple person, lol. I see shiny effects, and I'm happy.
Here you can see what the panels typically look like before I add some lighting effects with a dodge layer:
But yeah, that's pretty much it. I am a very simple artist. I don't do a lot of post-processing and filters and such. 