I LIKE TO MODIFY WHAT I SAID:
I now believe CURRENT playmobil plastic is inferior to vintage plastic.
I now own playmobil stuff from vintage days to about 2000, and current.
OLD Steck and old ships are definitely FAR MORE SOLID than current castles system x and large playset pieces, even the newer ship designs. The old steck and ships have a noticeable "heft" to them just when you touch it, or pick it up. When I take a dremel to it (for customizing), the dremel doesn't really melt it. It's like carving solid WOOD.
Newer ships, like the 4290 and especially the new Roman ship, as well as some of the modern theme ships I've handled, feel more "plasticy." Same can be said of modern castles such as the 3268 Knights Empire Castle. I can bend the plastic with little effort from my own fingers or hands compared to a steck piece or an older ship.
As far as Klickies go, I think the quality went as follows:
vintage: less than good (imo)
mid (2000 and up): best quality
current: WORST
Why? Vintage klickies still stand the test of time, but you can tell they are made of a diff kind of plastic subject to loose joints, yellowing etc....and they're more "shiny" surface.
mid-range klickies are more solid, made from what seems to be better plastics, don't get loose as easily, and have a less smooth surface (not as shiny).
CURRENT klickies like dragon knights and romans are CHEAP plastic!!! you can see some of the injection mold swirls on the parts. They feel somehow "lighter" in weight than an older kliky (unless I'm imagining it). and they're flimsy! Several of my newer klickies have this problem of having too tight of wrist joints, and when you try to turn the wrist, their arm twists instead! And there are VISIBLE mold-seam lines that protrude from the cast and get in the way of movement of parts (like the wrists). I even compared a standard knights sword to a vintage one, and the current sword was DEFINITELY flimsier than the vintage one of the same design! And the newer klickies arecloser to having a matte finish (at least on the fleshtoned parts) and feel thinner. At least with the lots I have! (I've been buying a lot of specials lately, dragon knights, regular knights, and romans). The only thing I like better about new klickies is they now have well-done tampo-printing designs on them that make them more AESTHETICALLY beautiful compared to vintage or even mid-range klickies.
So I modify my post now because I was comparing vintage to more mid-aged playmobil, which I belive is better stilll than vintage. But more RECENT playmobil plastic is cheaper IMO!!