Many favorite memories, but ours are mostly from the small ships.
1) idling off a small island in Glacier Bay watching sea lions roar and shove each other off the small beach where they crowded together, with puffins floating just off the bow on the other side of the vessel, while all of us watched this standing on the bow only 15 feet above the water - then noticing one of the big ships sailing in the distance, missing all of what we were seeing
2) same cruise - nosing right up to a waterfall in steep Tracy Arm, while passengers filled cups with water from the waterfall
3) same cruise - passengers betting how long it would take a bergy bit to melt, as it sat in a plastic-lined box in the boat's lounge
4) same cruise - the "buddy tags" we used to indicate whether we were onboard or onshore in a port, and the announcement that we couldn't leave port yet because "cabin 201" had not checked back in (and we all knew who that was!)

5) the awesome scenery, which made us feel so small, seeing Alaska from a 100-foot "ship"
6) different cruises - a really fun group of people at our table
7)different cruises - reading and watching the port activity (including all that goes along with docking and leaving port) from our balcony
8) too many more to mention!