Well, things people want patterns for are usually like...
School uniform jackets for men (the interesting ones haha)
Ball gown shapes?
Sailor moon uniforms
A lot of clothes share the same base, and can be customized from there. Lolita patterns would make you big bucks, I'd think also.
Cosplays in Progress:
Haruno Sakura (Shippuden)
Theodora (Oz the Great and Powerful)
C. Viper (Street Fighter)
Twilight Princess/BRAWL Zelda (Green BRAWL ver)
Tharja (Fire Emblem Awakening)