FNG & R22
Gliding is good fun and sharpens energy management a treat, but I'd recommend trying microlight flying - because of the low inertia you are flying them all the time, especially a flexwing. It also has the advantage of not requiring half a dozen other people to get you airborne.
If a 3-axis microlight isn't adventurous enough for you, try a flexwing! The conversion usually takes about 10-12 hours.
G