Yes I do! Especially when I am paper piecing. I put a pin straight down into a seam and then into the seam that its supposed to match. Then I pin in a couple of places to make sure all the seams will match as I sew. Always comes out perfectly. Don't want to waste time doing things over and over.

Not so much now that I have the built in IDT on my machine to keep both top and bottom moving together.

Only for long seams or if I'm trying to match up seams. For short seams, no.

Pin when I have to, don't pin if I can get away with it.

Sometimes alot, sometimes a little, sometimes I should have!

it depends on what I am working on

I'm a newbie, and I pin.

No, I do not pin.

If it is a choice to pin or not, if a dab of a glue stick will hold the fabrics together, I dab! Quilters best friends: glue sticks and invisible thread!! I have never had problems with sticky needle from glue or washing it out. I go thru lots of glue sticks! They are wonderful!!!

I pin seams so I can make sure they match, but not as a general rule anything else.