1) 3-speed roadster, aka the iron horse.
Would be an ideal city bike if it had a rack and decent brakes.
2) Fixed gear cyclocross aka wee blue floofy.
The advertised bike concept seems pretty daft to me even when it's single speed as sold, but apparently Genesis prefer to call it an XC rather than what it is - a low maintenance commuter that's sporty enough to stay fun.
3) 8-speed road bike aka black fruity.
This started life as my sister's 12-speed racer in 1988, and has been through a short conversion to fixed gear. Either floofy or fruity was getting gears and it was around half the price to gearify this one, which also meant I can keep the fixed+studs combo that I was so impressed by last winter.
4) Mountain bike with suspension fork de-suspended and road tyres installed, aka the tractor.
I got this free for helping a pal move house, and shortly afterwards bought a trailer to give it some purpose in life - as well as because I wanted one anyway but didn't have a tractor. Neat, I think.
- edit. Like DaveC I declared the cyclocross to count as hybrid(it does have flat bars after all) so I ticked all four of mine in.