Since I became an enthusiast I only had 2 n°1 and its the two Intamin Megacoasters in Europe. This might very well change with a trip in the US this summer though
Goliath,
Walibi Holland (June 2005 - November 2015)
My first airtime machine and the first truly "wow" coaster I've been on. It is very intense at the bottom of the first drop and right next delivers a fantastic airtime if you sit at the front. The Stengel Dive can gloriously snap you on a good run and the final bunny hops provide a nice conclusion to the ride. Ridden this one over 200 times and still can't get enough! Too bad its middle part isn't forceful enough imo...
Expedition GeForce (November 2015 - Present)
But EGF takes the airtime to the next level. Contrary to Goliath, it is relentless and just has more to it. The forest setting and some support headchoppers make the experience even more impressive. Oh, and that first drop is just hilarious at the back!