I am planning a cruise for late May 2010 to Alaska. I have previously sailed with Carnival on a 4 Day to the Caribbean, and want to explore another line this time. I am also going to be a solo cruiser, so this is an important consideration. I am in my late 20s(30 next year in fact), and thought since I am going to be in Vancouver anyway for cruise3sixty(a trade show focused on the cruise industry for travel agents), I would take a cruise to Alaska right before. I have narrowed it to Celebrity, Holland America, or Princess. I know that Celebrity is owned by Royal Caribbean and the other two are owned by Carnival Corp. Not a heavy party person, but do like to find a good lounge or piano bar for later in the evening. From your experiences, which line would you recommend for me?