I started on BF last year when I first got back into cycling, heavily perusing the Hybrid forum, since I was trying to make a hybrid out of my old MTB, since that's the bike I had and the riding that suited me at the time. Then I got my road bike and was heavy in that forum. Then I changed my MTB back to off-road duty and was perusing the MTB forums a bit. All that time I was in the commuting forums a bit, because of my desire to commute by bike. Then I actually started doing it last month and now I'm on this part of the forum almost all the time.
Still go over to the mechanics forum every now and then if I have an issue or whatever, but mostly I'm here in Commuting.