I started out fairly organized, then got messy. Most of my fabric is folded and stacked on shelves in the walk-in closet in my office, and I also have a smallish cabinet in the closet with fabric stacked on the shelves. I have a fat quarter "suitcase" that has quite a few FQs in it (its a soft-sided bag with a clear side). I have some in storage totes, some still in the bags from the store.
And, lately I have been quilting with fabric from my business inventory, rather than my personal stash, so my stash hasn't decreased in a couple years.
If you'd like to see a few of my quilts, there is a quilt page on my website (link is in my signature).