I like the Galactic Tital (70709) the best, it has this really bulky ship that reminds me of Mars Mission (the 3 in 1 Drilling Unit) and how it can transform. My least favourite set is the .... uh.... I don't know, I like em' all. But if I had to choose one, it would be Warp Stinger. The goodie's vehicle is too small and undetailed, and the bug machine looks plain wierd. But the one that brings nostalgia is 70707-1: CLS-89 Eradicator Mech (Blazing Falcon anyone)?