I might be sick but I truly love both.
I love the pain of long steep grinders and demoralizing people as they crack and I go by but nothing beats the thrill of a super fast flowing downhill with some small air. I have not tried a true downhill course with big air and fear I might die if I ever did.
Hear is a video of me climbing some hills at the Iceman Race in Northern Michigan. It is a 30 mile point to point race with some good climbs at the end.
https://vimeo.com/10588082
These two are from a trip to Northern Georgia this spring.
https://vimeo.com/41661461
https://vimeo.com/41661463
None of these do justice to either the grade or the speed.