I took a pair of 1.5mm gloves and I was glad I did. I hadn't noticed one of my boltsnaps had a sharp 'tag' on it and ripped my thumb to shreds within a couple of days of no glove wearing.
I wore the gloves for the remaining dives to protect the cuts. I was queried by one of the dive guides, but when I showed him why I was wearing gloves he didn't bother me any more
As far as I recall they were happy for people to wear gloves on the wreck dives anyway, just the reefs they frowned on it.