I've always used Photobucket for my pictures and things. Honestly, it's what I've used for my personal blogs, both for photos I post and for the design elements I use. (My personal blogs are far more interesting to look at, if only because I've played with them more.) It's user-friendly and compatible with everything I do. And, if I wanted to, I could order a calendar with my photos on it.
But, Flickr, I like. It's easier to use. Tagging takes less time. Uploading takes less time. This could certainly be more beneficial for my work stuff AND for my family stuff. (I just need to convince my boyfriend that Flickr really, really would be easier to use than setting up a MySpace for his family. Ugh.)
I like the group stuff too, everyone can share photos, or not share, or only share with certain groups. Seems SO much easier than what we do now ("here, let me email you these 50 photos 3 at a time"). It's also a neat way to get into social networking. More free-flowing and unstructured than MySpace or Ning.
This work is licensed by Jennifer Turney under a Creative Commons Attribution-Noncommercial-Share Alike 3.0 Unported License.