I think alot of people who use barbed hooks will not say due to all the defence of barbless hooks being less harmful etc... i dont think many people will want to come across as the sort that would harm the fish more than was neccesary sothey mayremain quiet.
That said, if im Tench fishing and its a very weedy swim i will 100% have no problems using micro barbed hooks, ive lost Tench in the weeds more times than id like, i know Sywell bans barbed hooks but some waters do not and on those waters it can pay to use barbed or micro barbedhooks, more fish on the banks etc especially on some tough waters where runs are rare, i dont want to lose my only run ofr days due to a Tench shedding the hook in the weed.
If i am fishing a small lake with plenty of silvers in it then its barbless all the way, i dont care so muchif i lose a couple of Roach but i dont want that certainpersonal bestBream or Tench falling off, which yes i know wont happen in the correct situation but its never all as simple as that.
I have caught Carp on barbless hooks where the hook has appeared to move around and caused a tear, but this could just be that the fish had already been caught recently by someone else and not related to the barbless hook i was using.
So to answer the question...
I would use all/any hooks that i felt were needed for the job in hand, i own maybe a 50/50 mix of barbed/barbless... its all situational.