I think the "alternative vote" is always interesting. Voting for who you believe in the most does not always equate to who you decide to vote for. I have not studied American candidates in any great detail but it could be that I would find I preffered the Green candidate to Bush or Kerry. If that happened and in this instance, I would vote Kerry as wanting Bush out would be my top priority. If I was less scared of Bush, the likelyhood of me placing the Green vote would increase.

With that exampe, that would be my choice but I'd still respect the person who voted Green and favoured expressing thier belief in a candidate over tactics.