I first started using Piranha for the entire campaign because of how it kicked ass in 2097.
But then I saw how Goteki 45 looked when barrel rolling. At a first glance I thought the rest of the ship was rotating around the cockpit (without the cockpit rotating itself)... that made me switch over. The 2nd colour scheme was the best as well, white with pink/yellow.
After a long time with G45 I started using AG-SYS for a change. I started smashing all my previous records and thought: "No wonder everyone's lost their individuality and only use Icaras/AG-SYS! This ship rocks!" I'm now one with the many, many other boring AG-SYS flyers. I used to take pride in being the only G45 HD ship user in an online race and doing well.
But I don't really mean the stuff about individuality... it's just sort of odd flying in a room with everyone being AG-SYS or Icaras.