Serendipity has brought me to a folding bicycle as an option for my next bike. I ride a Co-Motion Mocha tandem and a Schwinn Fastback Comp road. To complete my bike riding I will at some point get an MTB which can double as a touring bike. At this point all my touring has been on the tandem, which is the most fun you can have on two wheels, but stoker is not a fan of the really hard rides.
So I'm thinking a mid level mountain bike, rim brakes, front suspension fork, and keeping a spare non-suspended fork around for touring. Aluminium frame, Simano XT group I suppose, or some SRAM configuration.
As a mountain bike it will see everything from good pavement to bad gravel roads, no real technical rides. As a touring bike it would see more of the same, self supported with front and rear panniers. In both cases it should be ready to climb and descend decent mountain passes. I do not expect to do extended tours, more like a week or two at a time.
But then I though, why not a Bikefriday Llama? Bikefriday seems to claim that the Llama is capable of anything, and there are clear advantages to a folding bike in getting to the ride, however I'd like to hear about what are the disadvantages of a Llama vs a conventional MTB.