Air for me. Nostalgia may play a part, I was a teenager in the early 00's, but I think the "assume the position" teaser campaign was brilliantly done. The final adverts still look good now, albeit with slightly dodgy CGI. The logo, the colour palette, the SFX, all fantastic.
I tire of the endless stream of rollercoasters being sold on fear and intensity, and I get it, it appeals to their target audience, but with Air they dared to try something different. A rollercoaster for me is an instrument of joy, it is a freeing experience and the branding of Air captured that perfectly. It's a shame the rides theme never lived up to that, but the branding is spot on.