Our favourite ride was Goliath. It has great up and down motion and you get some marvelous zero-g time. It also runs really smoothly so it is easier on the joints. It is one of the longer coaster rides I've been on. Apparently, it is a 3/4 size version of a standard Six Flags ride and it is the tallest coaster in Canada.
The stand-up coaster Cobra was hell. The harness was incredibly uncomfortable (hit the wrong spots in private areas) and the ride was jerky enough to leave all three of us with terrible headaches. My husband said he just gritted his teeth and hoped it would end quickly because it caused so much pain to his head with the jerkiness and the side-to-side motion that kept banging his ears against the harness. This comes from a man who loves all kinds of roller coasters.