Variety

In the spirit of Christmas/Hanukkah/Festivus, here is a list of types of people you should date at least briefly during your life.
Obviously you won't get to all of them, but try and get a little variety.

The "way too hot for me" person
The person who reads a lot
The person with a weird/new sex fetish
The rich person
The adventurer
The great cook
The person you can be lazy with
The nerd/geek/dork
The douchebag
The "way too nice for me" person
The traveler
The "way too smart for me" person
and
The "way too dumb for me" person
The crazy
The person who will keep you grounded no matter what
The best friend turned lover
The person with a very specific interest (like model trains or knitting hats)
The long shot
The outdoorsman
The person you'd never bring home to your parents
The poor person
The social butterfly
The person with all the ins to clubs and restaurants
The person you wish could spend the rest of your life with
The person you do spend the rest of your life with (they're likely to be different)

Moral of the story: Love is like a box of chocolates, you take a bite out of each one until you find your favorite, then you eat all of it.