Unpaved Landing areas

How often do you get to land or take off from something other than a
paved runway? The current books don't give it much thought and I
suspect because the writers are so new at this aviation thing, they
have little or no experience on anything but paved runways.
Part of the reason for this post was the resistance to more than a few
to not land on a great 2000' grass strip that has an Interstate on one
end, and trees on the other. I have no idea why they are afraid to
land on this strip. There are at least three grass strips of 2000'
length in this area and some that are longer (one is about 4000').
What has your experience been? I have no idea how much time I have
operating off strips of 1200' or less, grass, gravel, sand, etc and no
problems. Must be at least thousands of them, both in terms of take
off and landings as well as hours.
Ol S&B