Since the tragic accident of the Costa Concordia I can not tell you how many people have asked us why would you cruise again, is it safe and questions of the like.  Life itself is an adventure, we travel all the time to and from work, family activities and more, do we stop to think "wow, this particular mode of transportation has a high number of accidents daily". No.  Yet very few of us fear driving again, just a thought! Cruising is a new experience each time you cruise and it's that adventure that will keep you going back for more once you've done it! 
Still not sure... plan a 2-3 night cruise which offers the introduction to cruising, without the long term commitment!

Happy Sailing All