I liked 1,2 3 & 4 of the Underworld series. Super-cool kinetic style over any meaningful substance. And I really only rate the 4th one because it lacks Scott Speedman's incredibly wooden presence dragging everything down. In a series that so full of flash, ultra-violence and impressive casting over, y'know, quality writing, there he is, standing there looking vaguely bewildered by the knowledge that two mythic species are warring over his bloodline; this utter plank of a actor.
I rank 2 over 1 for the sole reason that he dies in it, at least for a little while, plus the fights are way cooler.
Although the 5th one lacks him as well but by this time the (scant) worldbuilding was a complete mess; it has the same energy of the Resident Evil movies of the era, they just pulled out random ideas without thinking of what came before or what would follow.
Daft guilty pleasure. I own all the dvds, own a Selene poster and Selene/Faith is a crack!ship of mine.