I loved Alpengeist. Just huge, fast and great fun.
Talon was pretty close behind, and I also enjoyed the good bits of Great Bear (the good bits are brilliant, the not so good bits, not so good :lol: ).
Nemesis I've been on too many times, but usually once or twice a season it will catch me off guard and remind me of when I used to love it (long before I was an enthusiast).
Without riding them all a fair amount, over a number of years - it's difficult to really say to be honest. You become accustomed to what you know, and something new and fresh always seems to be better, but whether it would be or not after living with it, I don't know?