Darn, Sonicfactory. I was sitting there, waiting for your picture to load for about a minute!
Dampe: It's not just the colours. I have an 11472x6429 (huge) image here from Hubble of a nearby galaxy, and even without colour it would be incredible thanks to the ridiculously huge size of the thing. The symmetry and the round glow just looks awesome. (You can just search the web for something like "hubble galaxy image" to find a ton of them).
Then
the pictures with the actual vehicles in them are pretty neat as well. They aren't fantastically attractive, but again the scale of it all and the reminder of the great technology that is used to
take the picture is quite exciting!
Oh, and in this day and age the ones we are presented with (the ones that look pretty) are not 99% black and white. For 'big' shots they will get 3 different images with filters applied, then edit them together to get three colours. Some pictures just miraculously do look nice.
Not disagreeing, of course. The Mars ones particularly have a sad tendency to be given extra red :(