D&D back in grade school... which was way yonder... 24 or some years ago...
40k didn't happen for me til bout 12 years ago and it was a friend (that i'd know for ever) but he had never told me bout it til one day over a beer when he brought out some orks he was working on.. been hooked ever since!
starting with CSM, then TAU, then SM, then Orks, and now finally guard... oh the $$$$ i'be spent on this hobby!