I still prefer Flickr.
LJ allows my phone company's fluff text to be sent along with the body of the message post. You can add two dashes to the end of your LJ post to stop this behavior, but Flickr makes it easier by intelligently stripping it out without me having to think about it.
Also, why does LJ want to stick every image you post behind an lj-cut? What if I don't want an LJ-cut? Shouldn't I have the choice on that? It's my journal, after all...
The simple fact is that LJ's approach to usability here kinda sucks. Taking pictures with your phone is already too kludgy and dorky. On top of the standard subject and body text that you need to type up, LJ also wants us to remember to add the dashes to keep the spam out of our post... and to add all the photo post specific tags they created.
lj-gallery... lj-imgsecurity... lj-imgsize... lj-imglayout... lj-imgcut...
Of course, if you miss a dash or get the name wrong, you've messed up your post, and probably don't have any way of correcting it. Bollocks! Meanwhile, your date is left waiting around for ten minutes while you attempt to post a crappy low-res picture to your journal. See?! No wonder you never get asked out on a second date!
Camphones are the cheap bastard offspring of real digital cameras, but despite their drawbacks, what makes them worth using is ubiquity and convenience... but small digicams are getting pretty ubiquitous too. So, the lesson here is to make phonecams as convenient as possible. Point. Click. Share. Anything more than that is too much. That's why you want to pre-define all the relevant variables ahead of time, rather than trying to text them out on the run. Anything you type in outside of the basics should only be to change your settings from a pre-defined setting of your choice, not to configure things the way you want them by default.
Flickr does this well. LJ doesn't.
So, in summation of my findings: We all want convenience. Convenience. Convenience. Convenience... and a second date.