I currently use only Bikes and Studs. This is because they are designs that people know. When you take out a deck like Tally's or Guardians, I think that suspicion can be present in the mind of the spectators. I used to have no problem with it, but I figured why even open up the door of doubt when you don't need to?
Also, Bikes in my opinion are the best deck out there from what I've tried. (I have yet to use Tally's though. I don't doubt those feel better. I wanna get a brick.) I've used Arrcos, Bees every E deck, every T11 deck (not Centurions, but they feel the same as Guardians), Smoke & Mirrors, and Split Spades.
Out of all of them, Bikes in my opinion have the best stock and finish. I never understood why companies like printing cards on thick stock when the majority of people out there from what I've seen enjoy a thinner stock.
On top of the fact that Bikes are designs people know and I think they feel the best, they are the CHEAPEST! I could either pick up 2 decks of T11 decks or 1 deck of E's cards (with some leftover change), or I could pick up 12 of my favorite deck for $13 at Costco. $2 each for Studs. Not a bad deal if you ask me.
As for gaffs... Currently none. I do wanna get Magic Maker's gaff deck at some point though. That gaff deck looks awesome.
E gaff/Ultragaff are not for me. Magic Maker's gaff deck looks absolutely amazing.
-Doug