It's true, you will dive, dive, and dive some more on a liveaboard. However, like many others who have posted here, I felt far more relaxed upon my return that I did from traditional dive vacations. While you may do as many as 6 dives a day, you're only setting up your gear once, at the beginning of the trip. You wake up in the morning and you are in the water 15 minutes later. No hauling gear, setting it up, and breaking it down.
During intervals, and at night, we all hung out on deck and enjoyed a nice dinner and lots of conversation. The boat I was on also had a nice galley, where we were able to sit and play board games and watch videos.
There are boats out there that will pack 30 people on a trip. But if you look for a boat with a small crew, and one that limits itself to 10 or less passengers, you will have an excellent time, I assure you!