I hate those scissors that have a different size hole for each thumb. Maybe because I'm left-handed, but they just seem obnoxious to me.
I really miss my old pair of La Cross scissors. They weren't as big as the sewing scissors, but the thumb holes were the same size and they were made of good metal, not that stuff most scissors have today. La Cross still makes scissors, but mostly the small cosmetic kind, like for fingernails and moustaches.