'Freelancerish' means that the ship looks like, or very close to, a thing that microsoft could have included in 1.0.
If it is from a different show, movie, game etc, it is usualy non FLish because it would NEVER have been put in Vanila.
The Rheinland bomber and the Liberty gunboat FLish because they LOOK like something that belongs in vanilla, if microft had seen those designs, i am betting my lifes savings they would have taken them, and added wireframes etc to include them.
And to asnwere templars question, if the 'sabre' seris never existed, and the Viper did, then the Viper would be more FL'ish then the sabre series.
To sum it up again; If it looks like it could belong in vanilla, its 'Freelancerish'