I propose that we are all coin hunters, first and foremost. No matter what else we tell ourselves.
Most detectors, aside from special purpose units, are designed, measured and calibrated around coins. They'll find other metals, of course, but their core concept is to find coins. So in a sense the equipment we employ is purpose built coin-finding gear.
And as you pointed out, few of us will turn our noses up at a quarter or dime, when it appears. Especially a silver or gold one. A coin is a coin is a coin, after all...
Me, I specifically seek out old places where I stand a chance of finding old stuff - most of us do at some point or another. Some do it to exclusion and wouldnt be caught dead in any place that is "new." In searching these old, forgotten places, I find all sorts of odds and ends - and throw away pounds of rusty ferrous crap, boxes full of cans, handfuls of foil... all the usual junk left behind by humans.
Sometimes I go the other way and hunt only new places like parks schools and tot-lots. When in those places, I too, have my detector(s) optimized for jewelry in its many forms. Sometimes I have poor results and only do my bit to clean the park of trash. Other times, I'm working the odds well, having chosen a good day to be out and I finds me some of the precious stuff.
But, no matter what I find good or bad, or where I find it, I invariably keep the coins. Few things bring a smile like a Wheat Cent. Find an Indian Head or Large Cent and you'll break your arm patting yourself on the back. These things justify your efforts at the most basic level, whispering to you, "See, I AM here... it was all worth it."
Oh, I may curse them for being just lowly clads. I may complain when they don't appear in sufficient quantity. Or, occasionally, feel deflated when I carefully peel away the dirt of years - only to discover they are not the rarest of the rare.
But I invariably keep them all.
So yeah, I contend that we are ALL coin hunters. Everything else is just a challenge - or icing on the cake.