my personal favorite monster designs are the arachnotron and nightmare imp from doom 64. 64 has some of my favorite design in all of the doom games... except for its cacodemon of course.
https://www.youtube.com/watch?v=s9oQeW7owoI&pp=ygUPZGogdHJhY2Ugc25pcGVy
need more WADs with jungle/drum n bass, especially tracks like this. the harsh and dark sounds/atmospheres + the energy i think would be a great fit for DOOM.
really awesome map, got destroyed in my first couple of playthroughs but i loved the challenge. i'm also new to mapping and this gave me some inspiration for my own maps.
looking forward to seeing more maps from ya