I was really into the TF Vader. As a unique limited figure, it was truly collectable. Each new "silver" promo release diminishes that appeal.
I agree... I LOVED ToyFair Vader when I got it from the Fan Club.
It was a special Chase Piece that Limited people got at Toy Fair and then a few thousand lucky fans got one too. It was special.
Then came Silver R2. OK, I thought, it's like Vader for those that didn't get one. Even if you didn't get a Silver Vader, you could still get a special Silver Figure to celebrate the 25th Anniversary of ANH. Still Cool. I've got mine displayed next to TC-14 (aka Silver C-3PO

).
Then, Silver Fett. Eh. Not for the 25th anniv of ESB, just for "fun". I thought Silver Fett also kind of took a little shine off the uniqueness of 300th Fett too. I figured this was the end for "silver" figures, right?
Then, Clone Trooper. Uh... OK. STOP ALREADY! This HAS to be the last one I thought...
Now, Silver Sandtrooper? WTF? Why a Sandtrooper? TO celebrate the 8th Anniversary of the time he joined the PotF2 Figures? Huh? Why not Silver STORMTROOPER first? Is anyone else wanting Silver Biker Scout, Silver Snowtrooper, etc?
Ugh. Silver Figures are played out... IMHO. Move on to the next figure gimmick, perhaps a GLOW-IN-THE-DARK Spirit of Obi-Wan or Anakin figure? Use the nifty Holo figures with some Glow paint or plastic?
Or what about Exclusive Cards for some of the figures? Like a RH Darth Vader on a "Splinter of the Mind's Eye Card"? Or maybe a GA Thrawn on an "Heir to the Empire" Style Card? Bring back some of those great EU figures people still need with cool Novel-esque Cards!
Or maybe a Cloak-of-Invisibility Yoda... OR Neon-Camo Armor Stromtrooper. Uh, wait. I think I'm straying into other toy line now.
Jeff