It's interesting to see how different colorizations can change the mood of a photo so much.
For example, here is a photo I took tonight at OC on my way across campus going home from work.
Now here is that picture with a photoshop treatment called "Lovely and Ethereal". It's a subtle change, but I love how it makes it all melty and beautiful, really highlighting the sunset on the horizon.
Now check out this treatment, called PW's B&W. It's suddenly like the setting for a ghost story. Or maybe the beginning of a tornado.
Switch that to a Sepia tone, and now it feels very Oklahoma Western.
This is a peculiar but fun little action called Heartland that reminds me of a vintage postcard.
And last but not least, another one of my favorite actions called Colorized.
These actions, all from the Pioneer Woman and available at her website, are lots of fun if you use Photoshop.