Are you thinking of a tanto blade?
I personally think they're pointless. Some people like them for various reasons ("I use it for a paint scraper" or "I think the tip is stronger" or whatever else). I haven't found a task that calls for a tanto, and only a tanto. I scrape paint with a scraper, not my knife. I don't need to stab through car hoods or oil drums with my knife. And..... I don't need to hang around the mall and show off my knife.
If you're talking about chisel-ground blades, you'll hear both love & hate as well. I think they're just fine for general utility purposes. However, they're a little more difficult to use when you're whittling on some wood, or cutting cardboard, for example.
I think the Razels are kinda neat. Interesting concept, although I can see that nice sharp corner becoming rounded in a hurry. I might be more interested in them, but I like a blade with belly for slicing, and a tip for fine work.