Even if you like contrasty B&W, I would not advise you to pursue it at the expense of either shadow or highlight detail. You can always boost contrast later in printing or digital post-processing, but empty shadows and highlights just look hideous. 'Under-expose and over-develop' is a recipe for contrasty negatives that sacrifice shadow detail and have dense highlights that are beastly to print or scan. Then again, very thin negs are difficult too. If you will accept advice from an oldie who clearly remembers his early struggles back with improvised facilities in the 1960s, I recommend you concentrate on getting 'normal' negatives consistently before you reject normal in favour of a different look!