I started playing Teemo for the first time about 3 days ago (DCP so I've had him just ignored him).
OMG so amazing I've never had so much map awareness in any game ever, and I have always had my team compliment me on my shrooms.
I'm not even very good at Teemo, I've been building Nashtor's to spam Shroom as soon as I hit 6, then I just go more ability / AS items and giggle as people take my poison shots to the face and retreat into my shrooms.
Oh and I've learned something from playing as Teemo, normally you should NEVER chase someone through their tower, well if you're fighting Teemo NEVER chase him ANYWHERE, 3/4 of the time I get chased as Teemo they hit a pocket of shrooms and get ganked by my team.
- First week as Teemo, still a scrub but loving it!