Rimshot
 
http://askville.amazon.com/white-absence-color-black-combination-colors/AnswerViewer.do?requestId=3896130
 
Additive colors are when you blend light.  White light is the presence of all colors, where black is the absence of any color light, or any light at all.  This is what is happening with a prism where you can break apart light into its varoius components.  Consider having three spotlights, one each color, red, green and blue.  You setup these lights so you can shine them on a white piece of paper.  Turn on the blue light and you have a blue spot of light, turn on the other two lights and the light will mix and you have a white spot!  Yup, this works, been there and done that.
 
Additive colors are also how the monitor you are looking at right now works.  If you have a magnifying glass you can look at the white areas around these characters and see that it is really a set of red, green and blue pixels.  If you want a red spot on the screen the red pixel is turned on.  If you want a white spot you turn on all three pixels in the set and the viewer sees a white spot.  Any other color can be made by mixing different brightnesses of the three pixels. 
 
Subtractive colors are when a material absorbs colors.  This is how pigments like crayons, inks and paints work.  A red pigment is a material that absorbs all colors but red, The red light is reflected and the viewer sees red.  likewise a blue pigment is a material that absorbs all colors except blue.  When you mix pigments you get a material that absorbs more colors and will appear darker than the pigments you mixed.  Put enough of the right pigments into something and it will appear to be black as it absorbs all colors.  Thus a pigment subtracts colors from the reflected light.
 
Remember addition and subtraction works with colors.
 
Good job Rain!

I stand corrected.

Next you guys will be telling me there ain't no Am note on the bazz.
 

You can sit down now Ed. 

Rain
I'll have to give those V-Picks a try, Steve. 

I'll admit I was quite sceptical about using a solid pick, but a guy who used to frequent the Guitar Tracks forum recommended the V-Picks to me.
 
As they make such a wide range of shapes and thicknesses (see HERE), I bought a 'starter' pack of different styles to try them out. I also got a 'Screamer' (which turned out to be my favourite) and a 'Shredder', which is triangular and supposed to improve your sweep picking; I can't sweep, so I can't testify to that
 
One thing for sure though, they are very comfortable to grip, in fact my experience is the thicker the pick, the easier they are to use.

craigb
You can sit down now Ed. 

Jest let me know when I can get up, mmmmmkaay?

Wow, weird, Craig's picture is almost my exact live setup right down to the Dunlop Tortex 1.14 Purple Picks. Swap the mic out for a Sennheiser e935 and it's right on the money!
 
Have a good one, guys!
Bob

 
I use these.  I like the feel and tone of them.  And, since nothing else I own is close to this color, it is a lot easier to find them.  As an added bonus, if I am playing with another guitarist and I drop mine on the floor, the other guy never tries to claim them.