I have yet to do a HST that didn't lose the points!

FMQ, just don't have the time to devote to it that I want

Curves! I still hate sewing curves. Other than that I guess it's quilting---I never feel like I'm good enough at it.

Honest to God it's the scant 1/4 seam. I sewed clothes for over 40 years before I ever learned to piece a quilt. I believe with sewing, it's a 5/8 seam so it was much larger than a 'scant' 1/4 as my teacher said over and over. I was so embarrassed I couldn't sew it. And this went on for over 2 years. The other problem I had was cutting accurately with the rotary blade, when I folded my fabric, I made the V in the strip. I could cut anything but those long strips. I am far from perfect today, but I do sew a neat 1/4 seam and no more V's in my strips finally.

Keeping the long cuts with the rotary cutter straight, followed by the dread scant 1/4 seam. For so many years, I would just ease in the difference when sewing clothing. But those very small differences make a huge difference over a block with many pieces. Now a confession--I love to put on bindings. Just something soothing about it, unlike sandwiching, which I would love to hire to hire someone to do.

FMQ - definitely. I don't think I've mastered anything yet, but I'm competent in lots of areas but FMQ. I really struggle with it - I practice and can see improvements but still... sigh... I work!!!

The one I haven't discovered yet, created or designed myself. :-)

Hand appliqué, it terrified me, now I'm addicted to it.

Cutting and squaring up the project before binding.