I base my decision on(in no order)...
1.the drop
2.The airtime
3.the positive g's
4.the speed
5.the length
6.the height
7.the station
8.how good the ride looks
9.the cars
10.the basic elements
11.banked turns
12.how smooth or rough
13.how many brake runs
14.ride capacity
15.GP impact
16.placment in the park
17.the que area
18.the ride at night
19.quality of inversions(if any)
20.new types of elements
21.the ending