I like both.
But, I am coming to prefer cam tangs (no half stop).
My knives without half stop are able to be opened with one hand (hook a nail, pull it part open, switch grip and finish opening it on my leg, or with fingers).
More importantly, on a knife without a half stop, I can push it half way closed with my thumb (without it snapping to the half position and biting me) and close it the rest of the way with just one hand.
My next custom I will request cam tang.
I do still like half stops, though on some knives.