Her broad outlook on life allows O'Neil to see the big picture, and to often shy away from dealing with the minute details.
Her main love interest in the series was Casey Jones.
In later episodes, she is shown to have some spying and combat skills, though not on par with the turtles.
This is April's life-lesson - to accept the natural limitations of the world and its habitants in order to make it possible for her to enjoy life more fully.