I'm going to agree with many on here and say the first drop on The Swarm. It's both terrifying and exhilarating and I love it. Also, the indoor section on SAW and the zero-G bunny hop on The Smiler with all of the effects. It looks just as good as it feels aha.
i live in the middle east (qatar) but am from england, and my fave elements would be the barrel rolls in colossus and formulla rossas launch. those who thought stealths launch was powerful, this one feels like your face will rip off!