Sampler for those that like the number "10"
1) Old Italian steel road bike, Campagnolo Record or NR equipped.
2) Italian steel road bike from the MTB era; Record-C or Dura-Ace equipped; bonus points for garish paint jobs.
3) USA/Canada boutique-builder steel road or mountain bike (Serotta, Richard Sachs, Rock Lobster, Ritchey, Klein, Spectrum, Brodie, Strawberry, etc.)
4) USA or Canada-built handmade steel road bike from major manufacturer (Trek, Specialized, Cannondale, Miele, Schwinn Paramount / Waterford, etc.).
5) Old British steel road bike from pre-boom era; bonus points for Flying Scot or Hetchins.
6) High-end French steel road (Peugeot PX-10 or PY-10; Motobecane Grand Record; Gitane TdF, etc.)
7) High-end Japanese steel road (3Rensho, Nagasawa, Panasonic Osaka; Cherubim; Kalavinka, etc.)
8) Fixed-gear; track or vintage high-end road bike set up for courier/street use,
9) Drop-bar vintage MTB or hybrid.
10) Vintage cyclocross bike with fat tubular tires.