http://www.mediafire.com/?tuqx66lg0pa7swv
Please bear in mind that I mostly use these curves for photos of nature (and that's really what they were designed for). I also tend to use a mixture of curves (23% of x; 33% of y etc), I'll never rely on the effect of just one curve (plus there are other wonderful features in PS as well).
I know most people would prefer to have curves that would look good on every photo, but unfortunately that's not possible in reality.
Also, sorry for the names, they were a last-minute thing. My curves are usually named "isdof8ufsdk", or something like that :P
My comments on how/where:
Greens - Adds a lot of contrast + green/yellow tint.
Light breeze - Adds a blue tint and creates a softer and lighter feel. Does best with lighter images.
This image was processed with a mixture of light breeze curve and a bit of something else (which I can't remember).
Miami - Very yellow/orange. I use it in moderation to add warmth to some images. It's good if you want to enhance/create a sunny photo.
For nature - Ah, a tricky one! If you have a yellow/green looking photo of grass etc, this is the one to bring out interesting colors in your shot. However, wood/dirt/brown things
will look extremely purple...so that makes this curve less versatile.
Old times - I haven't really encountered a photo that didn't look the part after using this curve (no guarantees, though, very dark images are always questionable).
The result? Slightly yellow/green older-looking colors. Basically a niche preset, useful if you're into the vintage-retro stuff.
June - Not the best for very "crowded" photos. The sample image covers the basic look that this should be good for.
July - Sweet, bright and wonderful. Slightly over the top contrast/brightness, doesn't alter the colors much.
August - Bright, vivid and happy colors. Use in moderation, 100% full on might be a bit too
much!
Dream - Very bright and simple colors. It can be used on darker images but it can also look good with lighter ones to create a pure, washed out look.