I'm going to bite the bullet and actually sail solo on an Alaskan cruise (DCL) in 8/13.
I've traveled often solo, but never cruised solo. I have a friend who often sailed solo on DCL. We have done two cruises together, and will be doing our third in 19 days.
Our first one, we shared a Cat 5 cabin, and both agreed that we like our space. We get along fine, but cruise cabins are small! Our next two cruises, we did - and will - still share - but in a suite.
We were going to sail together in 2013, but she finally talked her husband into doing a sailing with her. (I'm glad that she has, though I will miss sailing with her)
Since I had a solo concierge cabin booked on DCL (their newer Cat "V" category) I needed to stay with DCL or lose my deposit.
Decided if I were going to go solo, I'd do something a little more exotic than the Eastern or Western. I had really wanted to do the WBTA, but DCL still has not announced it at this date. So...Alaska it is.