What type of protagonist do you like? An out and out hero? An anti-hero? Something in between?
I like male protagonists who are broken in some way, too much baggage, too much life experience that has kicked them down hard but they just refuse to stay down.
Michael Marshal Smith is hands down my favorite author. His hero's are usually in situations out of their control, they are usually weighed down with just too much life. Violence, drugs, bad relationships, lost loved ones, whatever, they are not usually heroes, just men who are trying to do the right thing, even though the world is beating them down.
So, do you like the Luke Skywalker type? Shiny moral compass, nice hair and good teeth? Or do you prefer the Han Solo types? The guys who will shoot first, because they won't take a bullet first, just to be sure its a bad guy?