I would have to sit on a character idea before I make up a theme for their diary. In my opinion, the diary needs to compliment who the character is as a human being, not the other way around. I'd want to fully finish my CS before I make the diary.

Jester and Sunshine, I'm pretty sure that Sunshine's idea was already down voted. And to be honest, I also like Animus' idea more than my own. But seeing how the OP hasn't decided on one of the three ideas, continuing to debate about it or other personal matters is completely useless. We've all argued our sides and players have chosen their sides. All we can do now is wait, if we're going to be playing together, let's not be at each other's throats about demeanor during a heated debate.

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Back to the Diary discussion, obviously coming up with our own designs is the best route, but if it suits a character's persona, I think using a style of Diary in the anime that fits should be ok. The cellphone Diaries should be a default if anything.