For the ultimate in flying fun, there's nothing quite like flying an F3F model in a good breeze from the top of a beautiful hill. There is just one little problem though: unless you are lucky enough to live next to a decent slope, a session with an F3F model will involve a bit of a drive.
Which is why I also love flying discus launch gliders. Long lazy flights, using nothing more than arm power and thermals to keep the model aloft - and all from the local park! It's flying at its purest.