Like the pictures but my question is what is HDR?
I have a Cannon S3IS. does this have the feature?
HDR means High Dynamic Range. That means that you need to take several photos of the same subject, without moving the camera - all in different exposures. From underexposed, through normal to overexposed. When you merge them, the software will take the details in highlights (like the sky) from the underexposed photo, details in shadows (like ground, or the room) from the overexposed one. The rest is taken from normal exposures and so on.
Some cameras do have that option, to spare you merging on a computer, but sadly your camera does not. Not all is lost though. Basically, put the camera on the tripod (or something flat and hard), put it in Aperture Priority Mode (AV), set the Aperture to 8 or 11. Shoot normal photo. Use exposure compensation, change the value to -1. Shoot. Make sure the camera doesn't move when you change values. Do another shot for +1. Merge in Photoshop or Photomatix (there are other options too).
To answer the original question, I like HDR. It gives you creative possibilities beyond normal photography. It was never meant to look extremely photoelectrically. Still, with some practice, you can make it as close as possible. Or be artistic and experiment. I think either one is good. Just do not overdo it.
Here is the link to an artistic version I've done:
http://500px.com/photo/10865099
Here is the link to natural looking landscape:
http://500px.com/photo/10865019
I guess it's about what do you want to achieve.