Try starting here: Texture, Porosity, and other Hair Type Madness

Also do you use heat often? That could be one of the reasons why your curl pattern isn't relatively uniform. What is your product line up like? And what's your current hair regimen?
last relaxer; 082708, BC; 081810, CG; 122410
high porosity, med/coarse texture, high density, color treated
condish;TN, DevaCurl Heaven in Hair stylers; Heaven in Hair, DevaCurl Curl Cream oils;Castor Oil

YTChannel: http://www.youtube.com/user/papiermachecurls