I've been doing Bionicle-themed mosaics ever since I collaborated with xccj and Nukaya back in 2010. At that point we had a handful of members on our side, mailing in pieces even if they weren't attending BrickFair.
We've since made a few more mosaics via collaboration, but a constant has been the base I've displayed them on.
In 2010 it was two plywood boards that would fit 3 baseplates by 3 baseplates.
In 2011 it was combined and trimmed into a long 2x6 board:
Then in 2013 it was trimmed again to fit a a single row of baseplates:
And now at Scouting for Bricks, I've adjusted it again, hopefully for the final time. It now fits 2 by 2 segments of baseplates, so xccj and I could collaborate on a mosaic design I've wanted to do for a few years now, Kurahk:
(It'll be at BrickFair VA too.)
It's been weird seeing it shrink and change shape over these years, but it's happy to still be excited about making mosaics, even if I've taken a year off here and there (2013's mosaic was at BrickCon).
What's next? Well, I've got a few clever mosaics in mind, so we'll see what I have the time and budget for.