After looking at Blitzcrank's kit on his wiki page he just seems . . . weird.

http://leagueoflegends.wikia.com/wiki/Blitzcrank

If I would have never actually seen him in-game and I would only have seen his kit, I would have never guessed that he's a support. His numbers and weird scalings would make you believe that he either would be an AD bruiser in the jungle or toplane or an AP Assassin.

His Q and ultimate have extremely high AP ratios and base damage, his Q has up to 300 magic damage with a 100% AP ratio and his ult has 500 base damage with another 100% AP ratio. If you look at the kit of your average mage or AP assassin this just seems HUGE even though in reality playing AP Blitzcrank comes close to just trolling.

Then there's something even weirder about him, his W not only gives him movement speed as everyone knows it also gives him . . . ATTACK SPEED? Wut? And his E is not like a Leona Q where it has a base damage plus an AP ratio, it's actually just 100% of your AD as bonus physical damage and it stays at that value, since it doesn't even scale with level, the only thing that really happens is just his cooldown going down with rank. Yet again, if I would never have seen it in game, I would probably play an auto-attack based AD bruiser version of him in the toplane or in the jungle with stuff like Trinity Force, Hydra or maybe even a Manamune build for his passive. And yet again, doing this kind of thing comes really fucking close to trolling when it comes to what it actually is like in-game.

I'm not even complaining - all these weird abilities and mix of ratios and scaling somehow makes him work as a support and not as what Riot probably intended him to be when they created him back in Beta or Alpha or whenever that was. As long as he's not either underpowered or overpowered I'm fine with where he is, it's just so freaking weird when you realize that THIS works.