First let me say that Detonator and Rush beat almost every single ride on this list.
1. Tonnere de Zeus
I have never felt more unsafe on a ride since Detonator. So much air, and back row on the first drop. Oh my goodness.
2. Stealth
Once again, I love the air on this. Backrow was always my fav, but I rode front row quite recently, and loved it equally. The adrenaline, the speed, the air. Love it.
3. Air/Oblivion
I couldn't decide. Air is just such a nice, fun ride. But Oblivion is so thrilling, but it's so short, so they both tie for first.
4. Saw the Ride
I haven't really ever had a bumpiness problem like everyone else seems to have. I just find it a little short. The inside is great, and the outside is fine if a little dull.
5. Swarm fowards and backwards
Short! I rode front row before they made the changes, and I rode backwards quite recently. I do like backwards a lot, and it does add an air of unpredictability, but I missed some of the near misses. I was very surprised when I flew backwards through the new billboard, and found my self shouting "Oh wow that was cool". I look forward to trying it forwards.
6. Th13teen
I don't know whether this is just me trying to flip the bird at all the people who really hated it, but I actually really enjoy it. Near the back you get some fun airtime, and I love the drop section, even if the bit afterwards is a bit of an anticlimax.
7. Nemesis inferno
Surprisingly forceful and dizzy making. The only ride that actually leaves me a little disorientated after riding. Great fun.
8. Vampire
My first "big" coaster, and still holds a special place in my heart, especially the fly over the town and then the dive into the tunnel.
9. Duel
I know this doesn't really count, but I have never been more scared in my life. I hate animatronics, and I hate zombies, so the mixture is one of my worst fears. I literally sat most of the ride with a hood over my head, my palms over my eyes, and my fingers in my ears yelling "OH GOD OH GOD OH GOD". Re-rode it about 5 times.
10.Nemesis (I'm so sorry)
I don't know why I don't really like it, and I'm sorry. It's just everyone always goes on about the way it's so good, and it sure is good, but it isn't that amazing. I have fun on the + g turn and the inversion over the station, but otherwise it's just kinda meh. Plus when I last rode it with my hands up, my finger caught in part of the car as it flipped over the station, and ended up red and covered in oil which not only scared me, but kinda hurt too.
Notable mentions:
Spinball Whizzer (painful but fun)
Colossus (if they would change those bloody trains)
Flying Fish (no trip to Thorpe is complete without it)
Rita (great fun)
Loggers Leap and Tidal Wave (my fav water rides ever)