In the main, I prefer plain. At the office my EDC is a Kershaw Scallion (plain). Away from the office, I carry a Cold Steel Pro-lite (Drop-point - plain) clipped in my front pants pocket and it's fraternal twin (with a serrated edge) clipped into the waistband of my trousers over the left rear pocket. I use the plain edge far more frequently, but I have the other, "just in case."
Boatsaylor
AUDACES FORTUNA JUVAT !