I guess I'm a practical sort, I just have two for everyday use. I subsisted with one hybrid for the first few years of commuting (my only cycling), but that wore out and I decided I wanted a good-weather and bad-weather, so now I have those two. I actually also have a mountain bike that I used in the interrim, but I'm not a mountain biker so I'll probably sell it. I don't use it for commuting anymore so I didn't count it.

Hmm, now you've got me thinking I ought to get that thing out again and remind myself what it feels like...

1) For good weather: Jamis Quest with flat bars
2) For bad weather: Huffy 3-speed internal hub
3) Not used so much anymore: Trek 820 (?) with road tires