These could be longer titled postings, or short postings from ping.fm, which I use to update Twitter, indenti.ca and/or a few additional micro-blogs.
If you see a short entry with no title, chances are, it was sent through ping.fm and maybe even from a cellphone
From time to time, I go back over my flickr site to view the various photos I've taken. Most of my favorites are sports related, but I have a few favorites of other types as well.
I think there's a common theme here. These happen to be some of my most popular with other people as well. At another type, I'll try to post some of my wildlife and landscape images that I'm proud of.