I have 5 right now:

1. Rivendell Road - commuting, light touring, maybe heavy touring? (experimenting with racks/bags)
2. Giordana XL-Eco - fast riding, occasional commutes
3. Cannondale F400 - off road trail riding
4. Schwinn KOM-10 - commuter, beater, winter bike (with studs)
5. Schwinn Speedster 3-spd - on loan, for sale when I get it back

The three bikes I commute on all have Brooks saddles, so I can attach a traditional saddlebag to hold my commute stuff. The KOM-10 and the Rivendell both have front baskets, too.

I may be looking for an N+1 for loaded touring, if loading up the Rivendell with 40-50 lbs doesn't feel right.