That I not already be participating in a bunch of other RPs already, for one. Also, I have to feel like I have a working knowledge of Homestuck's mechanics, which right now, I'm only partly comfortable with. And as much as I do like the idea of time shenanigans, I wouldn't like to be the one perpetrating it. If you need a Hero of Time, it will not be me.
In fact, if I do participate, I may just go with Zale's suggestion that I be a Maid of Doom. Setting up ways for foes to fail, and keeping an eye out, so that others don't.
Though, I wonder, how would we perpetrate the Trolls? Are we playing as ourselves, and our 'Patron Troll'? Just...there's stuff that needs working on, to make parameters clear, like we did with the LOC rules.
“…Judge not what a man has done, but judge what he could have done if he was a different bloke altogether. For art thou a leper? And a leper can changeth his spots…” --Rudy Wade, Misfits (Series 4, Episode 8)