Not too many "just enough"...

+ Waterford custom commuter (cost justified, of course...and I have secure indoor parking)
+ Surly Pacer backup commuter (because driving is not an option and the bus is just....well, a bus)
+ Waterford S&S coupled touring bike
+ Waterford go-fast
+ Surly Troll for winter commuting
+ Garage sale Terry for the trainer

All have a purpose; all get used. The newest bike in my stable is the Waterford Commuter, but like the other Waterfords is near to rolling the 10K number. The current race is between the S&S tourer and the commuter as to which rolls first. The commuter is the tortoise in the race, slowly plodding its numbers; the tourer rushes past it every vacation, only to see the tortoise plod by between trips.

Hmm...now that I think of it..not only do all have a purpose, all have their own unique personality...