Satoshi Dice was my first experience with bitcoin gambling and I was hooked right away! I first picked Sathoshi Dice because of its clean and well designed user interface. It has a very attractive and modern look to it. The user interface is very intuitive and makes it easy to pick your odds with a sliding scale. You will immediately be able to see how your winning chance corresponds to the payout multiplier. On top of the beautiful design, Satoshi Dice is a well known site and has a long track record of honesty. I have never had any problems with withdrawing bitcoin and the support staff is very responsive. They recently switched to an email based account login instead of using the old URL secret identifier, which makes it impossible to accidentally delete your account.