massive reconfiguration time again.

So sorry to change the subject to my massive configuration LOL, but I pulled a couple plugs and they seemed to look ok? Again I've been watching my air-fuel and it seems to be idling now where I want it at about 14.7 to 15... I'll be damned if all the times I punched it yesterday on those country roads I didn't look down once at a/f Gage....
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Sorry for my ignorance on the topic but what am I looking at?? Is that good or bad
Ps I know it's a spark plug for all the smarta$$ comments lol