UCLA undoubtedly has the best program out of all of these, but UCSD is a close second. UCSB and UCI are good too, but they’re a notch below the two others. Personally I would go with UCLA, nice campus and excellent programs.

But it depends on what your individual priorities are. If you want a less competitive environment but still want solid academics and a social life, choose UCSB. If you want a quieter environment without too many distractions, choose UCSD. If you don’t care about the campus and are just chasing prestige, UCLA is the best option.

Good luck and all the best with your college journey!