Thanks for that, folks. The mists have parted somewhat!

Does the double meaning make 'personify' enantiodromic or a contranym, then?
cf "Words that are their own antonym" anyone interested
I suppose the meanings are only contrary in that they make the verb transitive or intransitive. (terminology? - it's been a while!)

Just to stir up the water again, 'personalize' can mean exactly the same as 'personify'.

I considered this word a little way back in the discussion, thinking it may have had the meaning of "assign a personality to". Which, as it turns out, it does and doesn't...