I nearly unsubsubbed. GT is all the cruft and precious little of the TopGear soul it tried so cringlingly hard to steal. There is some good original content nontheless on prime.
I do care about the new car reviews, The News, 'what would happen if we made a car...out of spaghetti noodles', on-location shoots etc. GT has its own take on each of those.
To my amazement I found a surprisingly big catalog of RiffTrax and MST3K there. Definitely an unexpected bonus.