I wish the skin team wouldn't be afraid to branch out and make extreme/unexpected skins.
A lot of champions are confined to a certain demographic of skins unless they get a straight up joke skin or something that's part of a series of skins. My best example of this would be Miss Fortune. 5 of her skins (including her default) are just regular people with guns that you see in the real world. A pirate, a cowgirl, a pirate, a mobster, and a pirate. Unsurprisingly, they aren't popular. I realize several of them were old, but Captain Miss Fortune was released in 2015.
My point is, I want to see skins that are totally out of character for the champion, the whole purpose of a skin is to have the same champion with an entirely different look. I want to see human champions become inhuman, and I want them to have totally different "jobs".
I don't think something like this would ever happen with the cautious direction the skin team seems to be going in, but how amazing would it be? https://s-media-cache-ak0.pinimg.com/564x/5b/ab/83/5bab83f5582435d7bf73e0225f14e207.jpg
The coolest thing about fanmade skin concepts is that the champion is recognizable, but just barely. You know who you're playing but it feels totally different.
While the leaked Star Guardian Ezreal skin sounds cool, he already has pulsefire and arcade, and it would have been a lot more interesting on someone like Taric or Urgot. Demonblade Yasuo was basically already done with bloodmoon Yasuo.