Teemo makes a great ADC if you can make it to late game, but she's pretty worthless until then. Also, you have to be able to bait people over the shrooms to be effective which can be dangerous, and doesn't work on everyone.
AP Teemo is like the ghost you never even see until you're crippled with 1/4 life left, just hit a shroom and can barely move. Then she pops out of a bush laughing, blinds you and poisons you for the last few hundred health.
AD is more fun if you're playing scrubs, but AP is superior build overall. Teemo just isn't built for aggression.
Teemo is a dude.
Clearly doesn't know about League of Teemo. --- Monster Hunter Tri: Exalx (2ZFG9Y) HR:130+