Sorry about the general lack of presence on the boards. I've been really busy with school and the likes...anyways...
T-shirts (Number is relational to number of cruise days; #days - 2)
Shorts (Again, proportionate to number of days; if you re-wear things, it saves bag space)
Suit/Tux (depends which you can pull off best)
Tie(s)/Bowties (depends on the length of your cruise 1-7 days: 1; 8+ days: 2)
Toiletries (razors, toothbrush, shaving cream, shower gel, shampoo, face wash, deodorant, etc...)
Shoes (One fancy pair, one or two sneakers)