Certain f/x work better than others for certain subjects, most of it is "in the eye of the beholder" - some folks like certain effects, some like others!
In the 'back steps sunset" photo posted above in this thread I digitally removed a streetlight that was in the photo!
Paula, I like the last one, the "painted" effect.
This one's small (it's an avatar I had saved) - of the Toronto harbour.

The same photo in black and white

This one is an animated GIF I did from someone else's photo (with their permission)

http://mjbphotos.tripod.com
http://www.myspace.com/mikebirchmusic