OK, I'm going to rob the thread and go with:

"Your least favorite photo on your photostream that you won't delete, and why."

I've been culling the herd on my flickr stream and cutting out much of the dross. Kind of a New Year cleansing, (though I've been considering deleting the whole thing and starting fresh) and as close to a holiday theme as I will go. Here's my least favorite photo on my flickr stream:

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I took this on the first day I shot with my new lenses, and I had nothing but crap to show for it. This particular photo the evening light was amazing, a neat subject, pretty decent composition in the original, and I messed up the focus. The only way I could get anything out of it was to crop the crap out of it. I hate it, but I leave it as a reminder of that day, and until I learn more photography will be just a crapshoot for me.

Feel free to come up with your own themes.

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I have one this week!

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Because it's a great shot, except you can see me reflected in the window. *grumble grumble*

I like the wheels on the cross. Adds a bit of humor.

that would have to be this:
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everybody's blurred, there's stray light, and the chick in the back (on preview, so's the dude in the middle) is making that ridiculous 'dance orgasm face." But it was a work party pic, and nobody took that many, so..

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Crappy shot (of fireplace tools) taken while buzzed. I only keep it because it looks vaguely like an illustration from an old magazine or catalog, to me.

I like the wheels on the cross. Adds a bit of humor.

Eeee, I didn't even notice that! (btw, this was taken in Edinburgh during the Fringe Festival, so it was probably an advertisement for a show, not just some dudes totally into JC)

"Your least favorite photo on your photostream that you won't delete, and why." sounds too much like work. So here are some balloons.
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Hells, most of the photos on my flickr stream are crappy - taken while inebriated and just up there to share with my friends. All the non-snapshotty ones that make it on there, I actually like.

This is my least favorite
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because once you laugh weakly at the joke, there's not much left.

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This is a shot of two of my cats wrestling. The gray striped one is the kitten we rescued this past summer. The other is my eight year old Teddy, our "temporary visitor" that we've had for seven years. I love when they play, but I just can't seem to get a good shot.

By the way, arse_hat, I love that picture!

Well I don't have a photo stream but my favourite bad photo of last year is:
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because it was taken by my two year old with her new christmas present.