... and I still do, to be fair.
I'm not going to go with the obvious thing, which would be to dive through YouTube unearthing clips from 1980s children television (amazing though that would be); instead I'm going to address the programmes that had an impact on me in my teenage years.
First of all, Buffy The Vampire Slayer. I am not ashamed of this. I think it was absolute quality, with enough 'normal teenage stuff' to make it relatable. For example, there was a wonderful episode in which students started disappearing, fading into invisibility, and all it took to bring them back from oblivion was some eye contact or a quick conversation. It was a wonderful metaphor; directly relevant without being overbearingly obvious.
My favourite episode would either be Hush, or the musical episode (which was truly amazing if you loved the show as much as I did / do). Hush hardly had any dialogue, which many people would argue was an improvement (these people would be wrong and silly. Silly wrong people). The sheer horror levels of that episode were at an all-time high, and The Gentlemen were unforgettably creepy.
Also, eyecandy is always a winner. The series was around for long enough - six years, apparently - for my interests to phase from Xander to Spike. Even to Giles on some days. And Willow on others (no homo). Never Angel though, the big broody stump of emo that he was. He was all sad and pathetic and in love with Buffy, which held far less appeal than Spike's wannabe-rocker mojo. Of course they eventually cut Spike's balls off in an attempt to redeem him, and he turned all sad and pathetic and fell in love with Buffy. I mean dammit people.
Another programme that influenced me was Star Trek: The Next Generation, shuttup, it's awesome. And here's why. The spirit of adventure - of scientific discovery in space, and of pure indulgent fantasy in the holodeck - really caught my imagination. If I'd been any older I'm sure my imagination would have been elsewhere, no doubt musing on the contents of that secsi uniform (muscle padding, apparently. *Noise of disappointment*). So it's just as well TNG got me while I was young and innocent; I was too young to find Wesley Crusher irritating, so I just harboured confused daydreams of making friends with him and, I don't know, discussing dilithium crystals.
Now you kinda see it...
It's sad but true: if I watch something enough, I start to fantasize about having conversations with the characters. That's not insanity, it's imagination, and anyone who disagrees can take it up with Frank the 6-foot rabbit, can't they Frank.
Also, I'd like to cast an obvious yellow vote for the Simpsons. I'm pretty sure the Simpsons affected everyone in some way. They informed American and British humour for over a decade until South Park took the reins. I still hold a tremendous affection for the characters, although not to the point where I'd willingly watch them in anything for quite a while.
OH by the way, Dan, Stephen Fry, the ACTUAL Stephen Fry, is following me on Twitter. I Shit You Not. Admittedly he's got as many internet friends as MySpace Tom, but this IN NO WAY (slightly) cheapens how awesome this is.