I think at one point I figured that 11 was the ideal number of bikes. Lemme see if I can remember them
1. casual road bike (my Pinarello)
2. race road bike (nothing too fancy, something with 9 speed brifters probably)
3. rigid MTB
4. full suspension MTB
5. CX
6. Track
7. Tandem
8. Nice folder - Bike Friday, maybe Ritchey Breakaway
9. Around town bike - single speed w/ basket
Can't think of the other two ATM, must not have needed them that badly