If you liked "Kind of Blue" and want to try some more Miles, I'd recommend "My Funny Valentine", "Complete Birth of the Cool", "Sketches of Spain", and anything else he did with the Gil Evans Orchestra. I'll make you a list, but if you like singing, there's one album you should go buy today; " John Coltrane and Johnny Hartman". Also maybe some Bossa Nova, starting with Antonio Carlos Jobim, Stan Getz, Joao Gilberto (Buy "Getz/Gilberto" first). As categories of jazz, "Cool Jazz" was mostly the stuff that Miles Davis did in the fifties. In the late sixties he started playing around with all that jazz/rock fusion stuff that I think most jazz fans wish he hadn't. "Hot Jazz", as a genre, was originally a European phrase to describe the kind of stuff that Stephane Grapelli and Django Reinhardt were doing (Quintette du Hot Club du France"), although I've heard it used many time to describe anything that's uptempo and more frenetic, like Bebop. Let us know more specifically what you like and many of us hear can steer you where you want to go.

More later, Chet