My favorite is Nitro at Six Flags Great Adventure:

Its not too extreme and its a longer ride.
Everytime I go (Usually at least once every year or so) I try to ride Kingda Ka (Worlds tallest roller coaster) but the lines are so damned long I always give up:

Heres a picture of El Toro, the worlds tallest wooden, with Kingda Ka in the back:

I dont like wooden rollercoasters but that one wasnt too bad with the shaking.