I don't have as much as some since I know my hashrate isn't anything too large (+/- 4.2 GH/s), but I'll never forget this past summer when I was still scouring the forums for the newest scrypt altcoins and came across Realcoin. Now I didn't think too much of it, ya know I only had the little 7950 in my pc to mine with, but over the course of a month I mined/bought up to around 200,000 of those suckers. I ended going home for a month and forgetting about them completely...only to return and see that I had like 3.5 - 4 BTC worth of Realcoins out of nowhere! It was probably as happy as I've been since the lead-up to the April bubble when I was mining Litecoin with the same GPU and ended up with a few hundred dollars before the crash. Only to have that money disappear the day of the crash. Lolol

So I basically believe anything is possible now. I might not be an "early-adopter" as far as BTC is concerned and I may have missed the boat on every piece of mining tech out there, but I still I have hope that my little mining hobby will bring me a few welcome surprises.