Why doesn't this thread have more upvotes / comments? It's probably the funnest thread i've seen in awhile.
OT: Here are my top five favorite skins, listed from least to greatest (but they're all awesome anyhow). So with that said, thanks for the amazing topic OP!! :)
5
Firefox Ahri
http://i.imgur.com/CFTV4Mu.jpg
People tend to think Ahri as some seductive girl meant to arouse the male audience. While her appeal might appear that way, this skin just defines what she's really all about- domination of the mid lane. Seriously this skin is hardcore, and makes me feel like a beast when I get 17 kills while wearing this skin. Also because it reminds me that Ahri is in fact, the 9 tailed fox. Oh did I mention her tails in-game are on actual fire and beautiful to gaze at?
4
Ghost Bride Morgana
http://i.imgur.com/aTsSeF3.jpg
Not sure what makes this so unique, but I love everything about it. How metal the wings are, but the actual skin speaks to me in a sympathetic way ... like, Morgana is actually suffering and the fact she has tears stained on her face is pretty deep. She looks even better in-game and I adore her theme, because again it's a skin that seems to have a story behind it.
3
Ironscale Shyvana
http://i.imgur.com/YBnVqgP.jpg
This skin was a must have, for not only did I main Shyvana during Season 5 ... but, it really defines what kind of champion Shyvana is. The underdog of League, with a struggle to overcome the challenges and responsibilities a Jungler has, but once she gets there- she's the hero everyone can rely on. Thank god this one doesn't come with a helmet, for I love seeing her ruby hair and the fact she appears more human than any of her other skins.
2
Blood Moon Elise
http://i.imgur.com/Z3fVIoB.jpg
I admit, this is pretty 'lewd' in a sense, but at the same time Elise's skin is fantastic. Very mythical if you ignore the side boobs, along with how detailed and immersive her skin is all around the Blood Moon theme. Now that I think about it, nearly every champion with the Blood Moon theme looks awesome, but due to my love for Elise and her very interesting playstyle, this skin caused me to purchase it on day 1 release (which I hardly do for most skins). Heck even her spider form looks wicked awesome with this theme applied. Huh, i'm starting to notice half if not most of my favorite skins relate to red ... imagine that.
1
Demon Vi
http://i.imgur.com/DJxf9N4.jpg
Holy freaken crap. There are no words to describe the level of bad@$$ when it comes to this, spectacular skin. Not only does it nail Vi's personality, but it's everything I literally wanted out of a champion I main. Menacing, powerful, beautiful but not something to take as eye candy. No, this skin offers the intimidation factor with the phrase "When you see me coming, you're going to have a really bad time." Every other Vi skin is pretty cool, but oh man once I saw this I immediately bought it on day 1 (which again, is something I never really do). Did I forget to mention she sprouts wings and a tail whenever she is flying / rocket punching someone? It just makes this skin an automatic 10 / 10 (that and it feels like if Hellboy did a fusion dance with Scanty from Panty & Stocking with Garterbelt)
, that hot-coco just makes his W so much easier to teammates to read, it's almost a buff.
Ghost Bride 
Wild Card 
PAX 
Silver 
