I don't any further, and I only ever used one at a time (vs the Grimsons and Novaks of the world who use(d) multiple at once and I believe still do).
But as you can imagine, I can wear out my welcome quickly, so to get a fresh start, I'd basically start over.
Here's the list:
(Original CBMB)
Mighty Joe Young
Vash the Stampede
Teddy KGB (this one originally started as a joke when we wanted Matt Forte, Brandon Marshall and others paid. In Rounders, Teddy KGB famously says "Pay that man his money" with a thick and very bad russian accent. I made a sig of that with Forte on it... and Forte got paid. I changed it to Marshall, and then Marshall got paid and extended - this seriously happened for 4 players in a row - everyone who got into my sig got an extension and a contract. it was the damndest thing. Because of that, I kept it and had the mods disable Vash, which is what I always did when I switched to a new alt).
CSS
Came in as Teddy KGB
Bruno the Red
And back to where it all began because I am done with alts as Mighty Joe Young, like it or not.
Those were mine. Any others people associate with me are likely one of the other two alt-users I've mentioned, or someone else entirely.