As an ADC Kennen Fan...

I'm just kinda shocked (no pun intended) that less people play him that way

Now you probably think Why is playing ADC Kennen a good idea?

A. Basically Resource-less B. Difficult to itemize against (This is thank to the 80% AD rank 5 scaling on his W's Passive) resulting in about 2/3 Physical Damage, 1/3 Magic Damage output C. Easy CC for an ADC is really strong (CC is basically attached to Auto-Attack) D. Very good duelist thanks to C E. Basically an early game Vayne/Twitch F. Most ADC's don't have very strong power spikes with levels, Level 6 Kennen bot lane is free double kill G. Wanna dive? xD H. Fairly safe until you wanna dive yourself I. You don't have to buy Phantom Dancer thanks to E J. Small Hitbox (see yah Thresh ;) K. Pushes normally don't wanna be contested due to great teamfighting L. Snowballs like a hypercarry M. Off-meta yet viable strategy (Genja, former ADC from Gambit used to play it competitively back in Season 3 and was the one who basically created the ADC Kennen Metagame)

Quote from Leaguepedia

Known for his AD Kennen, Miss Fortune, Urgot (Solo Bot at IEM Season VI - World Championship) and popularizing Wriggle's Lantern on AD carries.

Holy s***

Who doesn't wanna be part of that?

Cons

A. Lacks large amounts of AD scaling (basically pre-rework Ashe tier) so can be outscaled in a flat AD crit build (I personally use a Vayne-like build to compensate) B. 550 range (not horrible but not great for a mixed damage "hypercarry") C. Tower killing potential isn't amazing compared to other standard ADC cough cough D. Needs to be ºل͜º ༽ºل͜º ༽ºل͜º ༽ ＥＶＥＲＹＯＮＥ，ＧＥＴ ＩＮ ＨＥＲＥ ༼ ºل͜º༼ ºل͜º༼ ºل͜º ༽ in order to be most effective lategame E. No real kind of poke outside of Q which benefits from AP better than AD

Feel free to add more to the discussion, but I personally feel ADC Kennen isn't being explored into very much and is currently very undermined

I personally feel that he is the best LOW ELO adc in the game