Blogger, wordpress.com, or live journal are probably the easiest. I haven't tried google, but that's an option too.

I really like live journal for what you're thinking of, because it has built-in mood settings and you can make entries public, available to all your friends (on live journal), available to just some of your friends, or completely private. BUT, I'm not sure you can upload photos without putting them up somewhere else.

I'm also a huge fan of wordpress as that's what I use and I'm very happy with it. I use the externally hosted version, but the free version at wordpress.com uses the same exact interface with the same great features and ease of use. You can definitely upload photos and they're really easy to manage and configure.

For editing outside of the software and cutting and pasting, I usually write in Notepad or Wordpad as they don't put on any formatting that will confuse the blog software. I haven't used blogger, if that's what you're using, but I know it works in Wordpress and would expect it to work in blogger too. Once it's pasted into the blog tool I just highlight things that I want formatted and select the button at the top for the type of formatting.