Clear lenses are just for the most basic vision. I personally like them.
Yellow lenses are good for lower light or somewhere with a lot of visual noise (like in the woods or a speedball field at the edge of the woods). Kinda hard to explain it, but everything is just more defined.
A smoke or mirror lens is like having sunglasses, it'll darken everything for you but using them in low light will be a *****.
You may call it fat, I call it bounce padding.
If I say "the safety frame claim is bull****" I'm not ripping on PE, the SL8R is my favorite gun EVER. If I say "DMs are overpriced" it doesn't mean Dye is a bad company, I want an NT11 in the worst way.
However, when I say "The Vapor is overpriced and not very good" I mean it. I won't have one unless it's cheaper than what I can get a G5 or Proton for or free.