I, too, am a nickle hound. I like nickels best because of all the different coins you can find in a nickel roll. For example, I find a fair number of buffalo's (including a '37 in BU condition), warnics (my favorite, but very difficult to find in good condition because of the silver alloy), V nickels (though haven't found one yet), proofs (I've found a half-dozen or so), Canadian nickels including silver, foreign coins of all types, and error coins such as die breaks and clipped planchets. I also keep any nickel with a mintage of less than 35 million or so, as well as any particular nickel in exceptional condition, with which I improve my books. There's just something about warnics, though, that floats my boat most of all. Oh, and I find no real difference between MWR and CWR, with the exception of a CWR I found recently that contained 25 buffalo's! HH!