How often do you change your needles? What size do you use for piecing? Machine quilting?

I am not a good one to ask on this question....I normally change my needle when I break it and that is not good.

the companies say after each 8 hrs or so of sewing. Then there are some of us who change them when they no longer punch a hole in the fabric or need to change because of different kind of thread.
So the answers are usually from:

Here-----------------------------to--------------Here

I know that I should change them a lot more often, but I admit to not doing it.

Glad to hear that I'm not the only one who waits until the needle breaks.

I used to change only RARELY. Now I change much more often, when I hear a thwacking sound at the needle. Only having whisper a quiet machine allowed me to learn this. If you don't like to change often, try Superior Threads' titanium needles.

Same here! They sew just as well. I do the same with my embroidery machine and no problems.

after about 8 to 10 hours of sewing.

Even though I know I should change more often - Only when they break!!!

I change mine about every 8 hour of sewing. I piece with Schmetz 75/11 quilting needles. Since I have a longarm, I most typically use a size 3.5 on it. I change my longarm needles with every quilt.