I definitely prefer Facebook for personal stuff, but use Twitter for promoting stuff, and also as my main news source. I follow a ton of news organizations, so I'm constantly being updated with what's going on. It's far easier than checking all of their sites.
I have to say I like Twitter more I like Facebook. Do you like Facebook or Twitter more?
It is hard to realize that some of the posts here point out they don't like Facebook, given the fact that there are over 900,000,000 members @ Facebook and is still growing world-wide. I think there is more content and style in Facebook over Twitter.
But I really like the total package with Twitter, the simplicity, the small size of the tweets, the easy digestibility of large streams, and its just an overall great design. (in my opinion)
On the other hand, I totally hate FB. I hate using FB. It's klunky as hell. But because so many people are using it, the rest of us kind of have to now. FB has replaced 90% of my personal emails, and I would say 100% of all booking communications.