I love my Improved Matrix Pack by Voodoo Tactical!
I picked up this pack after much searching and researching. Currently I use it as my EDC back for everything I need as a college student humping around campus all day long. I love the fact that it's got lots of room for everything you need, but has quite a few smaller pouches and pockets to separate things out. Several of the packs I looked at only had 1 or 2 large compartments. This one tops that for my use!