Thanks a lot! I really appreciate your feedback, and I took 1upindie2's comment into consideration. Since then, all of my new tilesets have been made in 32x32 as the main size.
You absolutely right, using 32x32 makes much more sense because it's easy to scale down to 16x16 with very little loss in quality, while also making the assets much easier to mix and match with other creators' work.
I'm also gradually updating some of my older 24x24 packs to 32x32, since I have quite a few older assets to revisit.
Thanks again for the great suggestion, and I'm really glad you enjoyed the bundle. It means a lot!