I used to wash in the morning, and would just let it air-dry, which pulled out the curl. Diffusing makes it look frizzy and crazy.

For some reason, though, if I wash and diffuse mostly-dry at night, letting it dry the rest of the way as I sleep makes it look better! (Plus I don't have to go out with wet hair!)
Previously Joy4ever.
Changed because the "number in place of a word" thing was bugging my no-longer-14-year-old self.