Well, let's see...
I've served onboard the USS Grayback (LPSS/SS-574), USS Jack (SSN-605), USS Barbel (SS-580), USS Los Angeles (SSN-688) and the USS Olympia (SSN-717).
Toured the USS Ohio on her first port visit to Pearl Harbor after having partied with the crew of the USS Darter at Beaman's

, needless to say that being attached to the USS Barbel at the time I felt like I had just walked into the bridge of the starship Enterprise when I walked into the control room

.
Worked on the electronic equipments within various boats, including the USS Nautilus (when she was active), while working at the Submarine Repair Facility in New London Ct. during my first shore duty (1978-1981).
Visited various boats in Pearl Harbor.
Partied on an Austrailian submarine, their 'Goat Locker' had invited the 'Goat Lockers' of the 4 Los Angeles class boats that were in port with them in Yokosuka, Japan for a 'get-together'

(it definitely felt weird drinking alcohol onboard a submarine

, but I soon got over it

). Those mates could really drink up a storm, but that's another story altogether
I would love to get a tour of any Virginia class boat that ever pulls into Pearl Harbor... this lady, I have just got to get into