Goliath is pretty notorious for that final helix--"the centrifuge"--and most people do at least gray out regularly.
While the GP really seems to like FT, if you're a fanatic, you probably didn't miss too much. It's just too short to be of much consequence. Not that it's bad... I do enjoy it for what it is... but I also don't think it's worth the fairly long lines it usually gets (mostly due to slow capacity).
X2, love it or hate it, is a unique beast. It is a shame you missed it, but I do concur with most of this board... if you're not feeling well, it still isn't/wasn't worth it.
I know I've sometimes missed rides I wanted to go on due to health/weather/time constraints. It's no fun, but it happens.