There are a few bikes I don't ever see fitting into my life:
folder
bent
BSO
full sus MTB
beater
vintage
single speed
IGH
bamboo
currently have:
road bike (Madone CF 2x10)
swiss army knife of bikes (Troll steel 1x11)
monstercross/commuter (Lynskey titanium 2x11)
travel bike (World Troller steel with couplers 3x9)
fat bike (bikesdirect special from CL aluminum 2x10)
The current line up can take me almost anywhere in most conditions, assuming I select the right bike.