Careful who you call a rat. It might be your Meteor, Terran Empire.
Look at her dead on. Havoc has a rats nose in the form of her nose mounted sensor array, a rats ears in her engine intakes, swollen cheeks in the blisters of her fuselage, whiskers in the small probes that are around the forward fuselage, beady eyes in here laser warning receivers, buck teeth in her gun turret. even the side profile is rat like. if you were to anthropomorphise her she is a rat. rats are survivors, aggressive creatures that find ways to live in places the would be impossible for you or I.
most other modern attack choppers resemble preying mantis KA50 earns the name werewolf from it's fuselage. Rah66 and wz10 I feel more resemble fish, well Z10 looks more like a wasp. hind D has the face of a proboscis monkey. being blunt beauty is in the eye of the beholder but I am pretty confident no attack chopper is going to win any awards for looks.