Even going as far back as I was a teen cruising with my uncle, I cannot remember any bad experiences from any cruise line, at least not from the staff. As far as ports go, Jamaica for some reason have had so many incidents, now I just get off at the dock to stretch my legs, not worth the hassle of venturing further.
If I had to say the friendliest experiences would be RCCL, Princess, and Silversea but that is probably due to me getting to know the staff on repeat sailings. I always have an awesome time in St Martin/Saint-Martin love Orient Beach!