Ok, let's get down to business.

What are the most important elements that you find really interesting or awesome in good signatures?

Concept?
Theme?
Style?
Lighting?
Text?
Use of c4d?
Prettiness?
Render?
Use of stock?
Composition?

Name your top 3 and then tell me why!

tbh i look at all of those things but i focus a lot on text, if yoused, and i also look for c4d usage and composition. stop using bigs werds. maeks mah head hurt.

I don't look at what elements have been used when judging a sig...I look at how well the ones that have been used have been implemented.

You can make an awesome signature using only one of those methods if you know what your doing. But if you don't it doesn't matter how many you use.

Color blending and balance mostly. Try not to swarm your piece with too much effects that they take away attention from the render.

And yeah, a good quality render can help.

i think :
-colors
-composition
-good quality render
-unique style

- Colours
- Quality of overall stock and filters. (like if it's blury/pixely/over sharpened)
- Text placement/composition.
and sometimes
- Lightning.

Concept, Design, Depth, Perception.

To be honest, they're all pretty important, except maybe c4ds imo. It just depends on how each element is executed and how they work together with the other elements used.

If I had to choose 3 though I'd probably go with: aesthetics/flow, concept and lighting. If the aesthetics/flow of a sig is lacking then the overall concept or idea behind the sig is probably suffering as well. Lighting because that can affect the color and depth of a sig, as well as the quality of the focal.