I've definitely walked from site where I had to register to see pics

Me too -- and I think several of the sites on Yahoo's recommended list do it; I'm just not sure which ones. Other sins: sites with impossible to navigate albums, sites that make it suck to just link to a picture, reaaaaaaallly slow sites, sites that nag me to pay for prints at every turn.

What is wrong with Flickr?

HA. I searched at Flickr for "FAQ" and was clearly not paying attention, since I ended up searching the photos. The first hit was a picture of Jon B's, with DX, Theo, Thessaly, Nutty, and FAQ!Wife.

Anyway, free Flickr accounts have a 100MB upload limit per month. Maybe I'm overestimating my needs, but at the very least, I couldn't transfer all of my photos over there at once.

Picasa is Google's service? I'll check that out.

If you want to upload high-quality pictures (not resized to 800X600, say), then flickr fills up pretty quick. If you're ok with resizing, then I haven't had problems--granted, I tend not to do a TON of pics all the time, but....

I don't know if other sites have it, they may. But I like the dedicated individual email address in flickr so I can email a picture to the site, no login or anything. If only I could convince my parents to use it to post photos to my page!

I think the Kodak site always looks like it wants you to register to look at albums, but you (sometimes, at least) don't really have to.

Yahoo emailed me a while ago. I let it ride for a while, and then just said I was going to move everything to Flickr. They said, "Ok! We'll let you know when it's done!" and ta-da! I had a Flickr pro account for a month because they moved everything over in the sets I'd had on Yahoo. I went in and did some rearranging and deletion, and am back to the three sets for free.

I don't hate Flickr, and it's easier to access than Photobucket for me. I've never dealt with Snapfish or Shutterfly, though. And I have a Kodak account, in fact, I dl pictures from the camera with Kodak gallery, but Flickr's easier for me to use online.

I wouldn't want to resize, really, since once I have something uploaded I pretty much discard it. But I don't have all that many pictures anyway.

Well, most of the uploader tools give you the option to group resize. If you're uploading your 5MB photos as you got them, you hit hte limit pretty quick

at the very least, I couldn't transfer all of my photos over there at once.

They'll do it for you. At least, they did for me.

I avoided Flickr until I got high-speed internet access. Now I like it a lot. The up side to migrating from Yahoo! to Flickr is that you get three months of paid ("pro") status. The downside is that free accounts only display the latest 200 pictures. If there are other advantages to a paid account, I can't remember them. Mostly what I like about Flickr are the bells and whistles -- the search functions, the tags, and the maps.

I have pictures at Photobucket, too. Uploading is not as easy and navigation is clunkier, but it works, and it's free. I keep meaning to create a bunch of folders and upload the rest of the pictures from my genealogy archive there, but it keeps slipping down the to-do list....