They are great in silver, and in early clad they are still pretty good (IMO). Then the low relief and spaghetti hair started and... blah.
They did go a little overboard with the hair. The ATBs have worn me out a bit just because there are to many that just aren't a very interesting subject matter, but I do really like some of the early ATB and state ones.
The "spaghetti hair" came in steps but most people consider it to be starting in 1995. The eagle reverse series was complete in '98. How the designs morph and evolve is one of the more interesting things about all moderns and especially the quarters. Most of them you can determine the date from the reverse or from obverse design elements.
The 1994-D Kennedy in 67 is hard to find, but there are 60-ish graded and probably a hundred more to be found. That is a conditional rarity, a subjective rarity. And then with classics we have actual rarity. Though not exactly a coin, this CWT is one of the favorite items in my collection. There are 5 to 10 of this variety known IN ANY GRADE. How many more are out there to be found, and how many are better than this $55 token? I challenge you to find another example. The variety is MI-225-AX-1a. Conditional rarity is grades, which are very subjective. Actual rarity is existence, which is much less subjective. Nevertheless both coins are rare, to different people. Which one would you rather own? Classics and moderns both have rare coins. The great thing about the hobby is that it accomodates to everyone's personal taste and style.
Still quite the newbie to Forum and coin collecting, so not trying to stir up a Hornets' nest... So, are we as a group saying that slabbed silver Kennedy Proofs (S mint mark), in PR69DCAM grade (or better), are NOT worth the money or time to collect? They seem to vary from year to year between $10 and $40, and seem gorgeous (to me). Admittedly, I've been sucked in to the PCGS app, and making sets. But, will they not increase in value in the future? Too many made and TPG'd in each year? Always interested to hear what the 'wise ones' have to say on the subject.
I don't collect Kennedy's or many moderns at all. That being said, collect what you like. It's your collection, so enjoy it. Due to the large quantities, excellent minting process and protective packaging, I don't see most proofs from the last 2 decades going up much in price. Every year, I buy a Silver Proof Set from the mint. Coins are beautiful to my eye. I leave them in the OGP and don't expect to have them appreciate much, if at all. That's about all I do with moderns. Have fun with the hobby and collect what you like.
The proof sets are cheap and some can't go down much more. These sets often contain superb examples. Great collections can be put together for very modest cost. Only the high grade proof Kennedys before 1973 command a lot of money. I wouldn't buy any coin for investment but I'd be a little leery of buying slabbed PR-69's made in the last twenty or thirty years for a large premium.