I'm with Benin here, stats seem to correlate very little with rides I enjoy versus ones I don't.
1. Imagination. This covers a lot of different things but basically, I prefer a well themed, well designed, well paced rollercoaster compared to an off the shelf, generic model. I like to be surprised, taken aback, shown different things. Things like Ride to Happiness, Taron, Toutatis, Nemesis are perfect examples.
2. High capacity/Reliable. I think there's a lot to be said for excellent operations and a lot of enthuisiasts forgive broken down rides and shoddy operations way too easily. My most recent example is Iron Grawzi. It doesn't matter how excellent it is, if you spend 5 minutes in the break run because of shoddy operations, everyone is going to look and feel bored out of their minds when they get off of the thing. Rides that I love because of their ease of riding are Nemesis, Blue Fire, El Toro.
3. Fun. Ultimately I want to get off a ride and be overwhelmed and want to run back round and do it all again. Toutatis, El Toro, Nemesis, Ride to Happiness fit those bills and I will just ride and ride and never get bored.