I've been lusting after a Tanto Zaan of late but, after seeing a Tanto 21 Micarta Inlay for a great deal I jumped on it. Not a Zaan but my first delve into the tanto world.
I think the tanto is a great and very useful grind. You essentially have two tips and two edges, and as such you really get the ability to think about how you'll approach a certain task. For some people that might be annoying, but for a knife guy I think that's a dream come true.
In general I love straight edged blades, or blades with a little belly like wharncliffe styles and the like. I think the CRK tanto grind gives you that type of straight-ish edge while giving you the bonus of that super strong tip and secondary edge.
I think sometimes people look at a tanto grind and think "aggressive" or "tactical" or "self defense". I hoped that, getting one in my hand, I would instead think "useful", which I definitely what happened. My next knife is going to be a tanto Zaan, no question!
If you have any other, more specific questions then let me know!