Adobe Photoshop is defenatly the powerhouse of image editing. You can't really draw much from scrach, but when combined with other applications as Illustrator, you can defenetly achive some cool looking results. Here's a little gallery of my work in photoshop:

Evil Tony I just though it would look cool... There's also a picture of "good tony" just below . I guess I was playing in Diablo 2 a bit too much at that time... Click to enlarge

Good Tony Wallpaper This actually was my desktop wallpaper for a while... I really liked how it turned out back then as it was one of my bigger images. Click to enlarge

SWAT Logo This is an actual logo I did for S.W.A.T. (programming help website). It might look a bit pixely as I was just learning about using Illustrator and Photoshop together.

Alternate SWAT Click for another image that I did for S.W.A.T...