The first ever episode I watched was 'Dalek', starring Chris and Billie.
But nonetheless, David Tennant will always be my Doctor. :)
<3

The first episode I ever saw was "Let's Kill Hitler"

I started with Rose.

My first episode was "The Eleventh Hour". One of my best friends brought all her DVDs to a sleepover, and we watched that one, and then "The Empty Child." <3 Love at first sight.

LOL! I watch my DVDs everyday. :)

It's the one I remember most. But, I was born when Eccleson started so I may have watched an episode or 2 on my Dad's lap (I can't stop him from thanking me for introducing me to Doctor Who at 4, when I remember when I started, but it could've been younger). So, I am probably the longest Whovian here (since 4 years old!). I've probably been one the longest.

Watched 'The Shakespeare Code' and been hooked ever since! :D