A number of my bikes are very similar to each other, which isn't the way I would've planned it if I had a master plan. That's just the way it worked out.

Bike #1 [ranked in order of how often I ride them] is my single speed dream machine.

Bike #2 is also single speed, used to be my dream machine, but that was before. Now it mostly goes out when it's raining, because it has good mudguards, or is very windy, because it has flat bars which I find slightly more stable.

Bike #3 used to have a three speed hub gear but now has only one gear because it's a folder and I wanted it to be as light as possible. It's exactly the right tool for its job: going on trains when full-sized bikes aren't allowed.

Bike #4 is permanently fixed to a turbo so maybe doesn't count, but it's put in a lot of time on the road so it gets an honorable mention. It's a hybrid, so was designed to be a multitool.

Bike #5 doesn't get used as often as it should, but it has an important job: taking me places where it needs to be locked up for some length of time. It was my cheapest bike, so it's been designated the sacrificial lamb, in case the gods decree that it's time for another thief to get lucky. Needless to say, it's single speed.

Bike #6 (scroll down) used to be the right tool for Bike #3's job, folding. Like bike #2 it got made redundant, though to a far greater extent. I've removed the rear derailleur, and it never had a front one, so guess what?

Bike #7 has multiple gears! But I never ride it.