The coast in Santa BAtbara runs east-west, not north-south. Directs are toward the ocean and away from the ocean. Watch the street names. Cabrillo, Castillo and Carrio (?) all cross the 101. It can be confusing.
The Mission in Santa Barbara is arguably the most photographed building anywhere because of the requirements of Brooks Institute. Watch for the student shoot and go back another time. But it is nice. Better I think is the Saint Barbara Greek Orthodox Church (white with blue roof) and/or the Mt. Carmel Catholic Church in Montecito. Around noon, the light is tangent to the east stucco wall showing amazing texture. The interiors of both churches are very nice.
Look at the Brooks photo displays by students.
Have lunch at La Superrica on North Milpas. It is very crouded for lunchdo go early or later. A favorite local and tourist place. Julia Child really chatted the place up.
Try Cold Springs Tavern for live blues on weekends. Food is OK too
The harbor is good most of the day with boats reflected in the water and fishing boats with colorful gear.
For street stuff, try down town along State St. The Brooks parking area is a good spot for city views w/ocean. UCSB isn't very far if you like that. The railroad tracks west (not north) of SB are interesting. Tressels and such. There are some interesting buildings and some painted walls. Look for details.
There are some well photographed funky trees south of down town (just south of 101 and the railroad tracks).
Nice city park just north of the Mission. Depemding on when you are there, the botanical gardens may be in bloom.
Because of Brooks, something new to photograph will be hard to find. People may mistake you for a Brookie and can be rude about photos. If you promise a print for modeling fee, follow through.