The single most... no idea, most of my questions/queries/problems are helped by a handful of people though. reinob, freemangordon, AapoRantalainen, Mentalist Traceur, Hurrian, vi_, marmistrz, misiak, misterc, RobbieThe1st, pali, int_ua, qwazix, Sarturn... come to think of it there is much more than handful, each and every one specialising and extremely helpful in their respective part. The above list was just out of the top of my head and is in no way exhaustive, thinking about it come more and more names. The best part about this community is even less tech-savy people like Addison are helpful and share their solutions/tricks. Really not sure what the answer to OP could be...