Thank you to everyone for all the information. I knew there were shorter liveaboards out there.
Damselfish, I'm looking for a shorter trip for the 1st time because my buddy is worried about the small boat experience and the intense dive schedule. If it were only me, I would book the full week. I would just feel horrible if I booked and paid for a full week and my buddy just wasn't into it after a couple of days. However, I appreciate your thoughts about most of the shorter trips not really providing the same experience -- I didn't think about that possibility.
Now that I have some information to chew on, I will consider it with my buddy and hopefully figure out what we want to do sometime soon. It might be a while before we sail, but I will report back.
Thanks again for all the info!