Best bet would be to stick to RCL or Carnival. I would even consider doing a b2b 7 day rather than a 2 week as longer cruises tend to skew to the older crowd. Also gives you some flexibility in itinerary, one week east one week west or repeat the itinerary to ports you know you will enjoy.
11 cruises in 2012, 90 nights at sea visiting 15 countries
8 cruises in 2013, 56 nights at sea visiting 7 countries
Next cruise: None scheduled
PM me if you need a cruisemate for any Europe, transatlantic, or Panama Canal cruises
Date, ship, cost pp