The three top ones were taken with my digital camera. They were all greatly underexposed (too dark). When I lightened them in IPhoto you could see all the colored pixels, which doesn't look good in a color photo. Unless you're trying to do something funky, which I very well may try at a later date!
But after changing them to black and white, the pixels now give a grainy look. I'm very happy to have stumbled on this, since I love, love, love a grainy b&w photo.
The bottom three were taken with true black and white film. And now that I'm comparing the two, the bottom ones are grainier. Is that a word? Should it be 'more grainy'? I still have one roll of b&w film left which I'll soon shoot. It's just too bad that the processing will be over $20.
And now that I've gotten used to instant feedback on a digital camera, it'll be hard as the dickens to take photos and not know if the exposure is correct. For me, that used to be the fascination of a film camera. You know, it's like being pregnant and not finding out the sex of the baby until after it's born. But now I want to know immediately! And I'm talking about photos, not babies.
*What is the dickens, and not Charles? That's just one of our 'southernisms'. But who knows what it means? We also say, "He's mean as the dickens." That doesn't make much sense either.