I like PicasaWeb. It's not bandwidth-limited, so it's good for putting up large batches at once. I also like the layout and interface better, and like being able to use keyboard shortcuts for things (like arrow keys to go between photos instead of clicking on stuff all the time).

I use flickr occasionally, to direct-link to photos off of my LJ. Flickr gets a lot of traffic, and a lot of my photos have been borrowed and used in other places. There's a community for all kinds of things; I've gotten comments inviting me to Food Shaped Like Animals and Hungry Trees and various location-specific pools, which are often entertaining.