I'm never too sure about this.
I usually end at my lowest choice, don't want to give any preference to candidates I really dislike (along with the candidates that I haven't a clue who they are as they don't seem to have campaigned!!)
But the husband thinks it's better to give all a preference. Don't really get his argument that it's because if you don't your vote might not count (in the case where your no1 is a shoe in). Well I get what he means just don't get how it's a waste - you might end up giving a vote to someone you don't want in. Or is that likely!!
Evidently stating to over think it, and getting myself in knots so appreciate anyone with more clarity giving their point of view!!!!