I have a couple of mini trappers that I carry from time to time, but for me I think that the Spyderco Kiwi is about as perfect as it gets for a gentlemans knife. They discontinued them recently, which bums me out, but last I looked they were still widely available. Cheap, too.
Here is why I like it over my trappers and my canoe (though I have learned to really like that Canoe): One, it is flatter and lighter. Really the weight is essentially a non issue, though it is true that it is lighter and that is an advantage for me in dress pants. The width, on the other hand, is a major plus, I can carry it and I don't even feel it, plus it doesn't clank around with my can of chew. The other reason is that I really prefer a wharncliffe style blade for daily use. I have a Case mini-trapper in which the clip point has been replaced with a wharncliffe, and I just like that better. Plus, I like that it is a "traditional" knife that doesn't look the least bit traditional.
The canoe I actually like better than my trappers. I can't truthfully say why other than that I just do.