I have a lot of love for many of the vehicles in this line, but it's difficult to pick a favorite. Most of the vehicles in this line used vintage molds but improved upon them immeasurably. The new paint apps. made those vintage molds look fantastic and the electronics actually had authentic sound fx for the first time. Electronics we did not see much of after this line ended until this year.
Also adding to the difficulty of picking a favorite is the fact that many of my favorites of the POTF2 vehicles have since been completely redone. Like the X-wing, TIE fighter, and Millenium Falcon.
Prior to the BMF I would probably have said the Falcon but now I will say the EFX X-wing, because it is an awesomr mold that is still used today.
The T-16 Skyhopper and Darth Vader's TIE x1 get honorable mentions from me.