My 'lack of comfort zone' is people. I'm not very gregarious. My idea of hell is pulling my head from under the dark-cloth and finding I've got an audience. Especially if they are tittering. It happens...
Consequently with big cameras I tend to photograph very, very remote landscapes. Not easy to find in the middle of the UK.
I don't particularly like landscapes that much - I just don't like being the centre of attention.
(But, I've got a really inconspicuous Minox 35 )