What was the first thread to which you posted? Was it featured in threadspotting? Had you read many threads before your first post?
Hmm… the first thread to which I posted was Please explain this license plate to me. (thank you, search engine!) I haven’t read Threadspotting yet (but plan to soon), so I have no idea if it was featured or not. I’m not sure that I read that many threads before my first post; maybe less than 30. (I lurked for a bit before registering)
Can you remember the first time you posted to a given forum? The first time you meaningfully contributed to a Great Debate or helped answer a General Question?
The forums I post to are ATMB, GQ, Cafe Society (very rarely), IMHO, MPSIMS, and the Pit. Thanks to the search engine, I can tell you exactly when I first posted to all these forums.
ATMB: Mar. 22 (They’ve calculated our posting ratios!)
GQ: Mar. 16 (not sure if I helped, though; see the “license plate” thread linked above)
Cafe Society: Mar. 17 (way earlier than I originally thought; in mid-May would have been my guess) (What’s up with Wendy Carlos?)
IMHO: Mar. 16 (What do you collect?)
MPSIMS: Mar. 19 (see “first thread I started,” linked above :D)
the Pit: Mar. 17 (Expensive restaurants)
As for GD, I’ve never contributed there yet, and very occasionally lurk there. I’m not sure I know much about the issues being presented therein, and I wouldn’t be able to coherently debate them, anyways.
I’m not sure if I helped answer a GQ; I know I’ve posted a couple of them there, though, if that counts.
Seriously though, I’m not sure if I helped answer a question, or just provided miscellaneous information that could be very easily discounted.
What was the first thread you started? Did it flop?
The first thread I started was this explanation of “Aiya!”. (again, thanks to the search engine) I don’t know if it flopped, as I got some replies thanking me for the explanation, and some replies adding more information. I can only hope my typing and previewing skills have gotten better since then! (as well as my knowing which smileys to use, and when to use them)
Have you been involved in any Dopefests, Secret Santas, White Elephants, Book Swaps?
Nope. However, I do hope to participate in a DopeFest sometime. I just don’t know when. 
And when did you realize you were going to stick around?
Oh, probably around early April. I liked the community here, and the fact that the board could be an outlet for expressing my feelings.
F_X
(Now I really should go to bed; took long enough to compose this post, what with the searching, the board being down, and everything else)