The “humour” is indeed in very bad taste and hasn’t aged well at all, with all the sexism and stuff. It’s probably the biggest point of criticism you can have from a modern day perspective.
At the time, I liked DN3D’s graphics a lot more than Quake’s. I didn’t really understand the 3D stuff, it just looked like a bunch of triangles without any detail to me. Meanwhile, DN3D looks very crisp at 800×600.
I understand Quake’s aesthetic better now, but I still have a soft spot for Duke Nukem 3D.