To quote on everyone who thinks the Avenger is ugly...I think you confuse Functional Design with Aesthetic Design.
I like the Avenger Class to the Fairchild A-10 Thunderbolt II...which is nicknamed "Warthog" with great affection by both pilot and groundpounders because of how ugly it is...and yet tough enough to take a serious beating.
First of all - a ship can be both functional and aesthetically pleasing... or at least tolerable. Secondly - I like the looks of A-10. It's not ugly. Avenger is though.