According to Facebook, "the new profile also gives you new ways to share your interests and activities. You can list the projects you worked on at your job, classes you took in school, your favorite musicians and sports teams, and more." I'm pretty sure I'm already doing this on a daily basis anyway. The only difference now is that just like the ability to tag your friends with Facebook Places, you can now do the same thing on an even more granular level. Now you aren't just documenting where you are, you can now also document where you are and what you are doing, with who, while you are there. I still get a little bit of a pit in my stomach because I feel like Facebook's quest to make things more personal online inadvertently teaches us that it's more important to document what we are doing rather than to actually focus on experiencing it. See my other post on that topic.
Improved photos and friends pages.
With the new "infinite scroll" feature, it's now a lot easier to browse through all photos. As you scroll down a profile, you'll notice that your vertical scroll bar keeps readjusting and getting shorter, allowing you to scroll through even more photos. I could probably live without this but it's nice to not have to dig through people's photos if they have several meticulously organized photo sets like I do. If it bothers you to never be able to reach the official bottom of a web page, this will probably drive you nuts.
There are a few other nuances but in a nutshell it's more of the same stuff.