I just wanted to add an idea that popped into my mind.

The longer you use Bitcoin, the more transactions you have (d'uh).

Most will not use only a single address, so over time you'll pile up heaps of addresses. Tagging them sure helps organizing, but adding a folder-like system would improve it even more.

I hope the following list illustrates what I mean:

That way you could sort in your addresses and group them together easily. Basically like on your computer: you don't store everything in a single folder, but use them to organize your files