The flat flower head pins for sure!!

My favorites are the long ones with yellow ball heads

I rarely pin, but when I do I use the flat head flower pins. More important than the pins, I think, is how you use them. I do not pin at a 90 degree angle from the edge of the fabric. Instead I pin seams at a 45 degree angle, with the pin going in lower on the edge and angled up to the left. This allows me to sew closer to the seam intersection and actually catch the seam allowances before I slide out the pin, not so much by pulling it,but by holding onto it as the feed dogs pull the fabric away from me. Try it - you'll like it!

The only time I use pins is when matching seams. Otherwise, I don't pin. It's easier to be able to adjust the edges while sewing. Sometimes when I use pins the fabric tends to "bubble" while sewing. When I do use pins, I prefer the flat flower headed pins.

My favorites are the long ones with the yellow pinheads....easy to use and easy to find if any should fall on the floor. Next I LOVE the little red Clover clips; they are perfect for lining things up and folding down the binding from front to the back.

For piecing, I like Clover 2507. The are very fine and therefore more fragile than
most other pins. I wouldn't use it on heavy fabric or multiple layers. They bend
easily and are pricey but I wouldn't be without them.

Clover glass head pins or IBC pins from Clothilde. I use the flower head pins a lot too. If I have to push a pin through fabric I toss it. A pin should glide right in.

I prefer the flower head pins too.

These are my favorites too! I like that they are thin, sharp and wee bit flexible. I've had mine for many years. These also tout that they are melt proof http://www.joann.com/dritz-flat-flow...kg/xprd315862/

Although I don't pin often - perhaps not as much as I should, lol - when I do, I prefer glass-headed pins, but not the ones that are super long. I'm not sure why, but I have an aversion the plastic flower ones.