I think cats can be trained (with a few exceptions), and I like the challenge of training a cat over the interwebz. I even have a full blown cat philosophy/theory of mind for the kittehs.
Bring me your smart, your recalcitrant, your unfathomable!
The armchair saddler
Our cats are pretty well trained, all come when called, even just individual names!
However, 2 like to hop on the counters when they think they can get away with it (ie: we're at work, upstairs). Aside from putting wax paper everywhere (think slip n' slide), what else can we do?