In my opinion, weather, sun and beach should all be one line item.
In general, UCSB students spend most of their time in Isla Vista and not in Santa Barbara.
Are you inferring that there is a lack of school spirit because there is no football team? There is a tremendous amount of school spirit and pride at UCSB. There is a large sense of connectedness among alumni as well.
While biking is the easiest way to get around, there is certainly no pressure. Many people walk or skateboard to class.
Good chance of living in a triple - Yes, this is the case at most of the UCs
No business major - Yes, this is the case at most of the UCs
Reasonable distance from home - Money isn’t an issue but do you want to spend a day travelling each way for Thanksgiving, Spring Break, etc? Or do you plan on staying at college during breaks?
Talk to your parents. If money truly isn’t an issue, go to UW Madison.