Shepard, because technically you are Shepard. Master Chief is still kickass though.
English
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This is why I've never really got why people bother to compare RPG characters to one from other genres. It's [i]your[/i] character, you made them how you envisioned them so of course you're going to like them, probably more than any character created by someone else. (Although this poll seems to be proving the opposite)