I'll tell you why I like the single shooters : Zen
The clean lines and 'nostalgia' are all part of the Zen, as well as the one-shot or nothing aspect.
Now, as to their being less expensive than magazine rifles, as was posted earlier, I hope someone lets the people selling Ruger No. 1 and Sharps rifles know about that, because they seem to be running about a grand and up. I've gotten some good deals on No. 1s, but never less than $600 in the last 5 years.
With two cartridges tucked between my fingers of the forward hand, I can reload my .416 Rigby No. 1 about as quickly as a bolt action can be worked.