We've got this new shiny flag overview where we can flag or disagree.
It would be nice if the previous flagging reason would be preselected, this would make it much easier to agree with a flag.
Bad idea, preselecting based on the most popular reason just introduces herd-think. You should decide for yourself if and why the post should be flagged and not just automatically follow what others may think.
I already see problems with this when users see questions with just one vote to close. Often it's the kiss of death for a perfectly on topic good question as soon as that