You can get great results with something like this to play around with bounce. I'm not opposed to buying bounce devices from Fong, or Lumiquest, or others, but I find I get results just as good with homemade stuff, and it avoids my having a collection of a dozen of these things, which would definitely happen, if I started. 
You'll notice the shadow under your chin is thinner, but much sharper with the on-camera flash. When you bounce, your face does look much better, and the shadow is not as well-defined, but it is much larger.
If you use a bounce card, you can throw a little light forward when bouncing to reduce that shadow under your chin, while retaining the softer lighting quality of the bounce. Why I like my homemade device so much is I can leave it pretty far back (straight up) and get just a touch of forward light with most of it bounced. . .or I can tilt it forward more and more to increase the amount of light thrown forward and decrease the bounce.
If I'm shooting a large group or in a room with a two-story ceiling, and I'm worried about bounce providing enough light, I'll push this thing all the way forward and point the flash absolutely straight up. Now I'm reflecting all the light forward and not getting any ceiling bounce. I get a lot of light that way, but it looks softer than aiming the flash at the subjects. The effect isn't as dramatic as you see in your camera flash, bounce comparison, but the light is a little better. Direct flash is just harsher.
I made this according to a post I read somewhere and a photo of a device on Sigma's website, here:
http://www.sigmaphoto.com …ashes_details.asp?id=3262
I made mine out of two sheets of 8X10 photo paper with a sheet of aluminum foil sandwiched between. The foil prevents light loss because the paper is translucent, and the three layers give it durability. Fold the paper around the flash and mark the front sides, then cut to width. I cut a slit in the back corners, then tape both sides of the slit so it will lay flat, but bend around the flash nicely. Then I make the two folds from the top of the slits to the edge, and finally, trim to desired height. It sits flat on top of my camera gear in the bag, and slips on easily.
The control I get with this by tilting it forward/back is tremendous. I don't feel the need to start a collection of "professional" bounce gear, but hey, try it if you want. Folks seem to rave about lots of different products! I just know I couldn't stop myself once I started and this works just great.
Have fun!
John
HOSTED PHOTO
please log in to view hosted photos in full size.