Every now and again, I carry a fixed blade, not every day, but for some specific purpose. Most often it has been a small Anza; i just drop it in a front pocket in its sheath. Sometimes I will carry a Mora, either a 612 or a Companion, again by sticking the knife and sheath in a pocket. The Moras are light enough to carry comfortably this way. I don’t ordinarily like to wear a sheath on my belt.
If I were going to carry everyday, I would consider a horizontal sheath. I like the small knives and sheaths produced by this guy:
Cowboy Knives Gallery