If it wasn't blatantly obvious before, I was Midna. She's like my favorite vidya game character ever, so how could I not choose her? :P
Also another thing you all should know. Whenever that dude Zero showed up (N1 maybe?), he actually offered me a choice between two options (this was mentioned in one of the phase change posts). He said that I could either kill myself and save a townie, or have a random townie be killed (but I would survive). I went back and forth on this decision and eventually using math and some flawed logic in my head I determined that it was a 50/50 chance that a good role would be randomly killed vs. a bad one. I actually PM'd Bac originally saying that I would choose the latter option, but within 3 minutes felt bad and regretted it and sent a PM back saying that I wanted to be killed instead. Bac rewarded me with immunity from the next lynch and nightkill.
If I had been smarter, I should have roleclaimed then and there. But then I was afraid that Mafia would try and kill me on N3 and none of my targets would have been revealed.