Some thought-provoking posts here. It's intersting to see the difference in approaches.
I think that landscape work often gains a kind of cumulative power when a particular place is the focus of the photographers interest. My imagination is fired as much by words as much as images and two writers that have had an influence on my photography illustrate this point.
One is Tim Robinson, a mapmaker and writer based on the west coast of Ireland who has written amazingly detailed studies of the Aran Islands and Connemara. These are the result of 30 years+ getting to know a pretty small area - the physical geography, the language and customs. The other is a poet, Norman MacCaig, much of whose work is centred on Assynt, in the North West Highlands of Scotland. He spent 30+ years thinking about this landscape. The results of both writers are not, to my mind, repetition, but a lifelong meditation on place and meaning. Because this is so concentrated, there is a remarkable cumulative power. I'd love my photographs to work in a similar way!