Am I supposed to be AWED by using and overgrown scooter?? WTF??
Imagine the terror people see by the mile-long death scooter! 
Back to the Advent.
What totaly drives me away from advent are their maniacal, crazed, bloodlusted voices resembling obsessed, posessed and retarded girls that watched too many Power Rangers episodes.
Some of their voices are really well-done, though. And it is hilarious to hear the Revelation yell "REVENGE!" when you tell it to attack. Or with the Radiance Battleship.
Click: "Unleash our wrath!"
Attack: "FEEL our wrath!"
Though on the Advent ship designs, most of them do look very pleasing. The Progen and Halcyon are especially beautiful ships that fit with their theme. I'd think that Advent ships look more 'fancy' is because of the Unity and general technological advances. I mean, TEC ship are essentially flying boxes with guns taped to them, and Vasari designs seem to rely on looking fearsome, and could also be outdated. The Advent had 1000 years to plan revenge on the Trade Order, and their ships show it. 
Nothing beats the supreme beauty of the Sova Carrier, though. 