Thanks for your insightful comments. We are taking a first cruise with Seabourn this summer, to the Baltic. I chose the 7 day cruise for the 3 days in St. Petersburg, since we, like you, cruise for the ports, not the ship. That's only a "floating hotel" to us.
We recently completed a 2 week Western Med, and west coast of Europe cruise on Oceania. The ship carried 700 passengers, and was much larger than we prefer. However, they did a nice job, the ship Insignia was beautiful, the food was excellent, the best we've had on a cruise line to date. We've cruised multiple times on Windstar (our favorite,) on Holland American (decent but ships way too big,) and have done river cruises, barge cruises, and special interest cruises on smaller vessels. So we have a pretty wide basis for comparison. Food and wine are very important to us. I don't care if house wines are "included," I will gladly pay for a good label of my choosing or pay for corkage for local wines we bring on board. We don't drink hard liquor, so the choices there are unimportant.
I am an active 60 year old, and don't need someone grabbing my elbow to to to the ladies, and actually prefer not to see service staff about unless I want something. We'll see how "unobtrusive" Seabourn service is.
When on board, we typically spend the time in our cabin, watching a movie or reading, or enjoying sea views. We never go to shows, the casino, the spa, pool or bars. Will use the gym if equipment is available. My husband will be disappointed about the TV set up.
During the day, we are off ship for the full time in all ports, usually arranging an excursion of some type. I'm working on that right now. On the Oceania cruise, I met many cruisers on line before the cruise and arranged shared tours in all 12 ports (including an overnight in Bordeaux where we were fortunate enough to join a tour of Chateau Lafite, the highlight of the stop.) I am not hearing back from any Seabourn cruisers yet, but hope that changes.
Your comments regarding your cruise were very enlightening, and I believe will help temper our expectations.