Khadir is still awful (and, Holmes, he's also a separatist on top of that), Marois isn't an option, but having learned more about this election, I'm increasingly rooting for Legault as Premier over Charest. Luc Harvey (CPQ, a minor party), like RB said, would be nice; a more explicitly federalist version of the CAQ which approves of Harper? Sign me up! But, ultimately, it would very much come down to where in Quebec I am; in preferred order of parties that have a chance in at least one seat, CAQ, PLQ, PQ, ON, QS. So I would determine who the favorite(s) are and then vote for whoever on that list has the highest chance of victory. With some exceptions (I'd probably vote for Lawrence Bergman over a CAQ candidate, for instance).
I hope the PQ wins, if only to bolster future support for the Bloc and displace a bit of the Orange Crush in 2015.
That's shallow; provincial government in Canada is (as I understand it) more powerful than US state government, and to me the idea of voting for a candidate, hoping they fail, to try to bring down a different candidate by guilt by association is just not appealing whatsoever. Vote for who you hope wins; in very multi-party Quebec, it should be underlined that you vote for the candidate, not the party; that you vote for a local representative, not a Premier; and that you should take into account who has a chance and who doesn't.