I got in just before the big price rise a couple of months back, sold a few BTC, realized the price was going up, then stopped selling.. that was a mistake, but realized that way too late.
Currently losing much more per week on the price drops than I'm gaining mining, and don't have the luxury of the nearly free power you get in the US so I'm resigned to never paying it off (price drop plus difficulty increase looks like converging with the power cost in the next month or so), but I had fun...