If I could, I'd vote for all of them(of course that wouldn't make sense since this is your "one" favorite character)
, mainly because I feel bad for Miyuki and Tsukasa being so low on the list
. Thumbs up to people who like either Miyuki or Tsukasa for being their favorite and for showing those characters some love.
Anyway I voted Kagami, and I was slightly surprised to see she's has the most votes so far(I would have thought Konata would be first). Surprised but somewhat not so surprised now that I think about it. <Insert qualities and charm of Kagami here>, and that is why I like Kagami and which is why I am not so surprised now to see Kagami being most voted.