I really like Craig Wisner's post in this discussion on the BPL forum. He's a potter and makes ceramic kuksas because he says:
"Whatever happened to style, to handmade goods, to enjoying a good cup of coffee, not in some old soda can, but in your favorite mug?"
I heartily agree!
Although, I have to say I have a certain fondness for tin cups as well, there's a certain nostalgia there for me.
In any case, if I'm in the wood making some fine tea with my portable brewing kit then I take along a small ceramic tea bowl as well, it's just me and the tea and nothing gets in the way! I tend to use my kuksa for stronger black, oolong and puerh teas. As it happens my favourite tea at the moment is Clipper English Breakfast. Nice and simple.