my trip was in 1992 - we had a management "conference" on the boat with the guys working in Finland - I was the Group MD and took quite a bit of abuse once the guys had had their fair share of the "refreshments"
I used to be regular mini-cruise customer to Sweden, Stockholm, not so much to Tallinn. After Estonia sunk in 1994 with 852 passengers, I took a pause. And I managed to avoid cruising very well, but took some trips to Tallinn and Stockholm during these years, though.
This autumn I cruised to Stockholm with my family and really enjoyed again the boat trip. Not management conference like cruising though with the family. But otherwise nice