When I record, I savor the slow caprices. I am a particularly nervous and sensitive performer - which explains why I had such a hard time with orchestra auditions. These soulful, calm caprices do wonders to soothe my nerves. I try to always have one in every recording session - the boost I get from singing on my viola helps me with the pyrotechnics of the other caprices.
Number 26 is to be played solely on the G-string (no pun intended!). I appreciate the narrow focus: it combines a very specific technique (G string tone and shifting) with a great melody. And there is even a little room to ornament. If you work on this, please send your own thoughts on the piece!