I use TweetDeck for a number of reasons.
1) It’s good and does what I want.
2) It looks cool.
3) It’s British, go us!
What I didn’t know that it was also 1337 to use it. I found a link to the list of clients that use twitter today. It lists the percentage of users of the that use that client, I noticed a strange thing about the % of users of TweetDeck.
Link to list here. (It might change… so this post might be so yesterday tomorrow.)
Edit: It changed whilst I was writing this… thus I was only 1337 for a moment… it figures.