the thing i like about these maps is that they are fun and enjoyable. they are focused more on being fun than they are on being detailed and fancy. i personally like the moderate balance of architecture in these maps, not too little/not too much. still, detailed and dynamically advanced architecture is a good thing in mapping, but (for me at least) too much of it can get a bit distracting...
my favorite maps are Werefrog, wine and roses, and CFA 3000
Pop'ems is a pack of 7 high-powered Aleph One net maps. They all have missile launchers, shotguns, assault rifles, and many of them have SMGs and flamethrowers as well. One map was a net map contest winner, and two others were runners up.