No DX for me...
I have a mix of plastics in my collection, with the exception of DX by Innova.
I used DX while I was a really new newbie, once I got my throwing skills under control (mostly), I started using better plastics. Early on I don't think the plastic really matters, until you get control of what your body is doing. Just like ball golf, better equipment doesn't help, until you learn how to swing the club.
Innova - Champion, Star and G Star - I have Teebirds in all three plastics. Of the three I prefer the Star plastic, it seems to skip off the ground better than the others.
Westside - I prefer Tournament plastic over their VIP plastic and I also use a Moonglow Manala.
Discraft - the only Discraft discs in my bag are Challenger putters
I also carry a Dynamic Discs Fusion Judge putter, it turns a little more than the Challenger, so getting around obstacles and to the basket is a little easier.
I give away DX plastic, that I still have, or find, to friends that are just starting out in the sport, much cheaper to replace DX than Star or G Star.
It is also much easier to walk away from a DX Teebird that was just thrown in the water, than it is a G Star TL3 first run. I will be getting wet to get the TL3 back.
For me it is about how the disc feels in my hand, if it feels good, I tend to throw it well...and DX plastic no longer feels good in my hand.
Binkholio
