I don't really understand the bag thing. I have one bag; it's black leather and very plain. I tend to destroy bags with great regularity, so I stick to one that's simple, not flashy (i.e. not a target for theives), easy to replace, and not too expensive.
I often look at designer bags but I've never been sufficiently taken with one to buy it. I might consider a LV, if I had that much spare cash sitting around, but I can't really get my head around spending that sort of money on a bag, (even though I can blow thousands on makeup in a very short space of time).