Well lets see if I can remember that far back (>.>)
I'm a fan of long series and I'd run out of scifi's that I could find that looked interesting, so I headed into my local Waterstones (I guess) and saw this great swathe of thick black books with coloured, numbered headers. I must've taken a look at EotW and noticed that I'd never heard of the author (not that I was much into the world of authors at the time, mainly just avoiding the popular culture ones). And like you say, the rest is history. It was instantly my favourite story of all time, vastly surpassing LotR and all the other stories I'd read up to that point, and any other story I'd heard, seen or experienced.
I can't remember the first read (up to 11:KoD) but I enjoyed it so much that I jumped in the net to find Dragonmount and ended up spending numerous hours posting in Fiddles, much to the distress of my schoolwork no doubt.
I grew away from there, never really sticking to an already established (and sprawling) community. But when the news hit that RJ had died, I was truly saddened. I guess I must've started frequenting there a little more again. I then found the wiki and spent another gratuitous amount of time on there.
I think I ignored TGS for a good period, into early 2010, where I finally succumbed to the temptation of a new Wheel of Time and discovered that, OH MY GAWD it was UHHMAAZZZZINNNNNNGGGG! I went and devoured Mistborn, which too was amazing. I ended up pre-ordering ToM, (which I read in one night XD) and waited patiently for WoK. I got Elantris and Warbreaker for Christmas and read them in days...and here we are, jumping up and down waiting for AoL and AMoL.
Thanks to Brandon and his fans I've discovered Malazan, Rothfuss, and Hundred Thousand Kingdoms just for the start. And OH MY GOD MORE BRANDON <3 <3 <3 <3 XD