Well, I'm about two years too late with this, as I joined back in the winter of 2010, but I only just bothered to look at this thread and realize what it was for, and I haven't posted on these forums too much, so...better late than never.
I've been listening to DiF since 2010, when I was fourteen. My initial discovery of the podcast was due to its involvement in the Lightsaber Choreography Competition; I was watching some of the entries and saw that they had commentaries. Curious, I decided to watch one. Then I saw that Dorkman was involved. Full stop. Dorkman? As in THE Dorkman? The one who made the Youtube short film I have watched dozens of times and shown to family and friends? I had to check this out, and decided to start at the beginning, with the commentary on The Phantom Menace. Less than ten minutes in, I was hooked.
Since then, the guys have indeed become four "friends in my head". I have spent countless hours listening and re-listening to episodes, drawing odd looks from family members as I burst into snorts of laughter. Finding the podcast was a huge turning point in my life; you guys were the ones who first encouraged me to think critically about the storytelling of the movies I was watching (and I can think of no better introduction to critical thinking than listening to you guys lay utter waste to the prequels). While I have definitely become more cynical since my discovery of the show, I don't think that's a bad thing. Thanks so much to you guys for what you've taught me and all the laughs you've given me; it means a lot.
Now, as to my own interests: my first and greatest love is reading, but film has been a huge part of my life ever since I was introduced to the original Star Wars trilogy by my parents at the age of eight. Seeing Star Wars remains the defining moment of my life, one that changed everything; Star Wars led to other sci-fi led to fantasy led to nerdiness led to looking up lightsaber duels on YouTube led to DiF.
I'll leave you guys with these three Top 10 lists so you can explore my tastes in entertainment. Try not to be too harsh. 
Top Ten Films
1. The Empire Strikes Back
2. The Princess Bride
3. The Fellowship of the Ring
4. Sweeney Todd: The Demon Barber of Fleet Street
5. Raiders of the Lost Ark
6. Groundhog Day
7. The Dark Knight
8. The Prince of Egypt
9. Beauty and the Beast
10. The Thing (1982)
Top Ten Albums
1. American Idiot (Green Day)
2. Who's Next (The Who)
3. Abbey Road (The Beatles)
4. The Black Parade (My Chemical Romance)
5. Warning (Green Day)
6. Zoso (Led Zeppelin)
7. Revolver (The Beatles)
8. Live at Leeds (The Who)
9. A Night at the Opera (Queen)
10. The White Album (The Beatles)
Top Ten Books
1. Something Wicked This Way Comes (Ray Bradbury)
2. Different Seasons ("Rita Hayworth and the Shawshank Redemption", "Apt Pupil", "The Body", "The Breathing Method") (Stephen King)
3. Fahrenheit 451 (Ray Bradbury)
4. Harry Potter and the Deathly Hallows (J. K. Rowling)
5. The Catcher in the Rye (J. D. Salinger)
6. The Man Who Was Thursday (G. K. Chesterton)
7. Misery (Stephen King)
8. American Gods (Neil Gaiman)
9. Apathy and Other Small Victories (Paul Neilan)
10. Revenge of the Sith (Matthew Stover)