Let's pick an alternative word to "good" if we're going to have a meaningful debate.
I've always based this on what JW once said - you can build the biggest, fastest ride in the world, but it may not be any good when you actually ride it. What makes a ride good is that feeling you get when you come off and think, wow, I wanna do that again right now!
There is only 1 ride in Alton I have ever had that feeling from and thats Nemesis. On the opposite side of the scale is The Smiler where I come off and think (1) I need a bucket and (2) I need headache pills!
As for BPB, Wild Mouse always makes me want to get straight back on (bruises excluded), as does Valhalla (in a wetsuit), oh and Grand National!