I went on Saturday too! Had a great time despite the absolute mess they made of the ques! Have to agree with MarkWaldorf and say Frank were my favourite of the day. I didn't see anyone absolutely outstanding that stood out as a possible winner.
I got there at about 10:45 and I got really lucky with how they split the queue as I ended up right at the front when the judges arrived so managed to get autographs and photos with Louis and Cheryl. Didn't manage to get Dannii's and Simon more or less ran straight in!