Okay, I know I'm a little late to the game in joining this thread, but it looks fun I've actually been growing my hair out since about April 2011, when I cut it to just above shoulder length. I dyed my hair several times in the fall (including highlights), so my hair was at a really fried/unhealthy state right before I started CG at the end of December 2011.

Here is from several years ago:
Attachment 21463

Here is last September, after cut/dye and before CG:
Attachment 21464

And here is now:
Attachment 21467Attachment 21468
I think I'm currently about BSL, or almost, in the very back; I get it trimmed every 10-12 weeks to help keep my layers/shape looking good while I'm growing it out. My goal is for the longest length to be between MBL and WL, so that from the front I still have a lot of longer layers.