<10%.

Not all lefties write with that weird over-rotated grip. I can write with a fountain pen without fear of smearing.

Quick-dry gel formulas are the new wave of gel pen and they are pretty easy to use as a lefty. Bic actually has my favorite of them, the Gelocity. It's very good if you like the Bic ballpoint's oily rolling action and want that as a gel.

They also smear when used in low temperature. Learned that the hard way when making notes outdoors, at sub-zero degree Celsius temps.

Other than that, gel pens are perfect to me.

I love staedtler fine liners - no pressure required, dries right away so no stains/smears, doesn't bleed through most papers, is waterproof

My uniball Jetstreams don't smear, I don’t even know if they are gel or not but they’ve been perfect. I’m left-handed too if it wasn’t obvious :)

I'll give them a try, thank you for the advice.