Off the top of my head I have approximately 24 different email addresses. They come from my office, university, fraternity, Gmail, Yahoo! and a couple of different organizations I belong to.
I have DSL at home and as part of the package they provide 11 email addresses. I have around three that I use consistently. One is strictly business. One is for newsletters that I enjoy reading. I don’t care if they sell my address because it serves a very basic function and I can tear through it in a hurry.
Beyond that I usually take advantage of the other email opportunitie because I figure, why not. You never know what you might need them for. It is the Costco influence, buy in bulk.
In any case, out of the 24 or so I can say that I consistently use about 8. Eventually when I receive enough spam I’ll rotate the old ones out and bring the newer addresses into play.
The nice thing is that they don’t take up much space in my house.