The Matterhorn will always have a special place in my heart since it was the first coaster I ever rode. Of late, it's been tough to take because of the aforementioned roughness.
I love the theming of BTMRR but it's a bit too slow.
Rode California Screamin' for the first time this past weekend and loved it. Only one big drawback: as my wife said (in mid-ride, mind you), "This music is horrible!"
Space wins it, hands down. Since the refurb, it's one of the best around.