What would your intended major be?
http://www.assist.org can help you find CCs that have better versus worse coverage of the prerequisite courses for your intended major at each UC and CSU. Be sure to check the CCs’ catalogs and schedules to make sure that the courses are offered, and in which semester/quarter. For example, for some majors like computer science, Laney, Diablo Valley, or a combination of the two have better coverage of the lower division courses than other CCs.
http://www.universityofcalifornia.edu/infocenter/california-community-college-enrollments-uc can show you which CCs have the largest number of transfer students. If several CCs have similar levels of coverage of your desired major’s courses, then choosing one with a large transfer-prep cohort may be socially advantageous (but be careful to make sure that this does not result in the courses you want being over-enrolled and difficult to get into).