Welcome Titles

A Title Sequence done in the same format as the show itself. Original footage is created to showcase elements of the show's world. Often, this takes the form of a main character walking though his neighborhood, greeting other characters on their way to work.

Fairly common in animation, but rare otherwise, probably due to the cost of creating such footage.

Examples

Coupling (US version)
Sesame Street
The Simpsons
TV Funhouse
Everybody Loves Raymond had the family introduced while passing by on a conveyor belt for a while.
At least one season of Ranma 1/2 had a brief segment after the Anime Theme Song titles introducing the main characters.
- Several of the later OVA episodes began with a song called "Where Do We Go From Here", during which the various cast members were shown around the neighborhood and/or on their way to school.
Nagasarete Airantou
Bear in The Big Blue House
Monday Night Raw had titles like this for a while, featuring Steve Austin. Oh, and the supporting cast were all fighting. And "neighbourhood" was a disused factory on fire.
Transformers openings tend to use this, except for the series that animate the Transformers in C Gi.