I do mini-trims as well. I've been growing my hair out for sometime now and it's almost to my shoulders.
I do have some straighter parts underneath near my neck which like to grow the fastest.
I hadn't cut it in a looooong time and I noticed it getting a little thin near the bottom. I only cut a little at a time so I don't take off more then intended. I finished trimming this morning before I showered. It's definitely looking a lot neater today.
2A/2B, fine, normal porosity
Growing out a pixie as of 12/20/12
Shampoo: Elucence MBS
Conditioner: Elucence MBC
Leave-in: CJ BeautiCurls
Stylers: SS FHG
Product Junkie that keeps falling off the wagon!