Ok, I'll stick my neck out.
When I get time I shall upload some sample images to help explain my "confusion".
Usually when I am out and taking images I do NOT use the flash. I don't know if it is because I don't have a good one, or it is the reason I am about to discuss.
However, on Sunday I was out and taking a "few" (295) images most of them without the flash.
Alas some are blurred because of shake. Luckily a lot were good.
Now, some images were too "difficult" without the flash and so I used the flash. Therefore I have some "A - B comparison" possible.
The no flash images had nice colours, where as the ones with the flashes were "washed out" and the colours were somewhat flat.
The picture didn't look that good/nice.
Yeah, ok, I also did some goofs - which I shall put down to "oops" as it has been a long time since using a flash - alas only the popup one on the 550D.
Would anyone mind helping me understand the initial problem of what is happening with the images?
As said, when I get time and find the ones I shall upload them. 295 is a lot to get through.