I'll be the spoiler here...... If you are a photographer, trying to be professional, and claiming to be knowledgeable, you should at least be familiar with the zone system. It's importance does lie in B & W, but still useful in color as well. It was probably the most innovative photo technique to happen in the past 100 years before digital. I'm only in my early 30's, so the technique is not outdated by any means. Basic, (remember I said BASIC) color correction in Photoshop should be done by finding gray balance in either curves or levels. The three eyedroppers that are there? that is what they are for. You find your whitest white, blackest black and a middle gray (you can find these by watching the color values in the info palette: RGB is easiest, all 3 close to 255 is white, closet to 0 is black, and to find the gray you find 3 values that are close to equal, say 141-143-142.) Now to be a critic. The first two corrections look like someone that had Photoshop Elements for 2 days and was playing around and found the hyper-real button. Yeah, you the saturation tool may not have been used, but they are for sure over-saturated. I can see jpeg artifacts on the Attack bike. that is a no-no. Evil-twin, I would consider yours pretty damn good. The tones are mostly correct, but the green did shift slightly. Cliff, the one you did before the vignetting was pretty good, but then you overdid it. I'm not for sure, but it looks like you are over-sharpening as well. The B & W is pretty good. Recon, I think you whites need to pop a bit more, but otherwise pretty good. Tom, I don't think over-saturation sells. Bright colors that pop, sure, but hyper-real, no. I'll post a few of mine in another message so just you don't think I'm full of shit.