On a Federation ship near the Cardassian border, selling Starfleet secrets to the Obsidian Order!
Why, hello...very nice to meet you, sir! What is it you have, that may be of interest to us?
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Now that's my forum "roleplay" character. But let's get a little more serious.
When I look at Trek society...at least, by the 24th century, I do not believe I would want to be human unless I were on some colony where there was more tolerance of varying human belief systems and religions. Ideally, this would be outside of Federation jurisdiction entirely.
But...I think that I would want most to be Cardassian, to be one of those who plays a role in the rebuilding of the Union following the Dominion War. To be there at the (new) beginning, to be part of shaping a nation before the stagnation and the apathy sets in...that would be a high privilege indeed. (I would also imagine myself as an Oralian believer, as seen in the novels.)