I'm going to make an assumtion here ... ... ... you know what happens when you do that, lol.
Anodized and ported seems to be leading the way, followed closely by natural aluminum and ported. Seeing as how ported is ahead in all finish choices, I'll port and plug all of them and let the user have the option. The guys wanting natural finish could have that too so they could do a bright polish for a couple dollars less.
Here is the assumption ... ... ... ... . I am assuming that everybody is just looking for color. Under that assumption, there is blue anodizing under the hood already and blue would seem to be the natural choice so it matched.
If I did blue anodize and machined a "C" after anodize to make it stand out in bright aluminum ... ... ... ... would y'all be into that?