HP5 or Delta 400 or Delta 3200 in a standard black and white developer. If I have the luxury, I pick one of these films based solely on the contrast in which I will be shooting. HP5 is my go-to film, and I use it as much as I can based on the lighting. If it simply gets too dark, Delta 3200 is next, and also used for very high contrast situations that would be a bear to print on HP5. I use Delta 400 only in certain situations: extremely flat lighting (because it renders more shadow contrast than HP5), or when I need the finest grain possible (almost never except "commercial" lowish light hand held portraits, which I would now do on digital anyhow). I have not done a lot of testing of Delta 400, but I have the other two very controllable.
As for developers, personally, I like HC for its convenience, cost, versatility, and shelf life. It develops any film you throw at it quite easily, and can get all sorts of results with litho film. (I hear you can print quite effectively with it as well in a pinch, though I have not tried it.) It is not grainy. It does not badly increase fog. It doesn't take up much space in my cabinets. Due to its high concentration, it is easily controllable and predictable no matter how old it is, which is what REALLY matters more than anything in all practicality; not the particular characteristics of the developer.