I like big blocks - nothing smaller than 8 or 9" up to 12 or 15" depending on the finished size I'm aiming for

i think i prefer the 8-10". i made 12" on a king and i felt that the design looked too spaced apart. definitely not into very small blocks

I rarely work with any blocks smaller than 8 inches, if I like the pattern and it's too small for me, I'll just enlarge the pieces.

I like 12" because there is so much that you can do with them...double the "recipe" and you've got a great wall-hanging, halve it and you've got blocks for baby quilt. Plus, I like a lot of room for quilting and the spaces get rather tight if the block is smaller than 12".

Varies with the particular block

I use anything 2 inches and larger but prefer smaller to larger