In general, I am a big fan of justices Thomas and Scalia. I think they are the two most libertarian on a court packed with statists. Both still aren't far enough, but the current trend in anti-government Constitutional thinking derives straight from Scalia.
That is why I am particularly upset at Citizens United v. Federal Election Commission. As I've gone along, I've grown to appreciate Vox Day's opinion that corporations should not have their "legal personhood" fiction, and that legal entities have no rights, much less First Amendment rights.
I wish Scalia had gone down that path here.